Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2219f5b86329554…

MALICIOUS

PDF

129.6 KB Created: 2021-07-17 07:15:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: af600656ccbaddaa524e8e6cfc2322c9 SHA-1: 024d32af4923a8cedb05cb8842b44c927abb94f9 SHA-256: a2219f5b8632955441ec2162c2e0ac3240b106203e3a7a68c94bd784587a60ad
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file was identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, with numerous URLs pointing to compromised WordPress uploads and disposable hosting. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it is designed to lure users to malicious sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9091

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://architects-desk.com/uploadsfile/29220263360.pdf In PDF document text
    • https://shared401k.com/wp-content/plugins/super-forms/uploads/php/files/a10e8035fd0460af698996196ce6057e/97897741992.pdfIn PDF document text
    • http://claudiodauelsberg.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606f3640960a3---3577266698.pdfIn PDF document text
    • https://alakharia.com/public_html/userfiles/file/97462618276.pdfIn PDF document text
    • https://jgmurphy.com/wp-content/plugins/super-forms/uploads/php/files/5eeb7c73c45f59453cf2303ea8992eeb/4414682451.pdfIn PDF document text
    • https://cristalensi.com/public/File/42520929924.pdfIn PDF document text
    • https://rugsinc.in/UserFiles/files/93472946588.pdfIn PDF document text
    • https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16084c976a9eb4---sizuwunonewetirunosizune.pdfIn PDF document text
    • https://stagerightstaging.com/wp-content/plugins/super-forms/uploads/php/files/3d6d586d1d3544932b78db7b843aa729/wipupunijujupenepigosaruj.pdfIn PDF document text
    • http://reutlinger.pl/userfiles/file/babokozorewajof.pdfIn PDF document text
    • http://www.cargeacrew.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609676d911e8e---20781603932.pdfIn PDF document text
    • http://www.insurancedirectcanada.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16099ec0a7960c---zanuwanaroribisujuvi.pdfIn PDF document text
    • http://geombiagioschettino.eu/userfiles/files/digakogufonujaxada.pdfIn PDF document text
    • http://ipjanah.ir/wp-content/plugins/super-forms/uploads/php/files/a62bm1l1r5h7m6forossgcauge/18021077059.pdfIn PDF document text
    • http://4darchitecture.org/img/all/93000056592.pdfIn PDF document text
    • http://mognational.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085b612067bb---12391759672.pdfIn PDF document text
    • http://uniondeautoescuelas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cffe2c464fe---30741067622.pdfIn PDF document text
    • https://sharzh-ufa.ru/wp-content/plugins/super-forms/uploads/php/files/53a712704f561410f0b387ac210f9113/nefesumuzufuzomexedotefo.pdfIn PDF document text
    • https://www.sahabatkeluargahomecare.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a06f2874c79---91101200044.pdfIn PDF document text
    • http://piotrkowska77.pl/zdjeciafile/47481495067.pdfIn PDF document text
    • http://pumarecovery.com/userfiles/files/97354132450.pdfIn PDF document text
    • https://giolog.biz/images/bulk_images/files/89735501016.pdfIn PDF document text
    • https://fatheragneliti.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609264f152719---rurafivozetazamogo.pdfIn PDF document text
    • https://pinyardim.com/calisma2/files/uploads/780514081.pdfIn PDF document text
    • https://whitelightdesign.com/wp-content/plugins/super-forms/uploads/php/files/f7d8e8ce45cf8e05749b9cbbeec96a94/zavilumijadesomemiboz.pdfIn PDF document text
    • https://ltanimalpark.com/wp-content/plugins/super-forms/uploads/php/files/3249c9c81a682e7871ad4414031291bf/xotimovokamesa.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=disagreeable+looking+meaningPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off0001bbd8.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1BBD8 29964 bytes
SHA-256: 87a956b74458b73bf3fcb9a06f15c57a82e9271b1e22b35e50f265d61a951633
font_00_sfnt_off00012339.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12339 32108 bytes
SHA-256: 8271112e7a33c522252f891be3da832caf0f45ec3beea3e3a3c9b87cdc143469
font_01_sfnt_off00016cf1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16CF1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000184fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x184FE 9316 bytes
SHA-256: 84ec3de5987ba0a90832689e69f0ba68c89863741ad68c3c46dab695065d02ac
font_03_sfnt_off0001a3ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A3CE 10584 bytes
SHA-256: f4214daa45dc0afe96aa3e9ef4c4d332da016e5e4accf7e2068eafa41cd1b384

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