Malicious PDF — malware analysis report

Static analysis result for SHA-256 74a0715246afb1f4…

MALICIOUS

PDF

86.1 KB Created: 2021-07-05 09:30:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: c204e068f37ccdef35bc3958f9bcbc07 SHA-1: 857d8f598c1ed6d500aa964fd1fd643777ef69b7 SHA-256: 74a0715246afb1f4790c9a686fec1ea63b4bb3cb60a615628a828b00587142de
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating it likely exploits a vulnerability or serves as a phishing lure. The document contains a link farm pointing to numerous external URLs, many hosted on compromised WordPress sites, suggesting an attempt to redirect users to malicious content or phishing pages. The presence of multiple external URIs and compromised CMS upload links strongly suggests a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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 https://garglob.ru/uplcv?utm_term=mr+and+mrs+digz PDF link annotation
    • https://purmoradiatoriai.lt/images/files/12801294799.pdfIn PDF document text
    • http://mobilenmr.com/files/files/72579374511.pdfIn PDF document text
    • https://study-go.info/wp-content/plugins/super-forms/uploads/php/files/ad829a6a4a3aae316f16eb3905c3b3f3/31875550019.pdfIn PDF document text
    • https://fotojursa.cz/userfiles/file/zolejomapovolubir.pdfIn PDF document text
    • https://area34.info/wp-content/plugins/super-forms/uploads/php/files/0f015aj18qnjhar48p3n32nmn5/tujozux.pdfIn PDF document text
    • https://takiminsahada.com/wp-content/plugins/super-forms/uploads/php/files/h20rjftq8215fjlhrkccd66l62/tesezukutudike.pdfIn PDF document text
    • https://www.cukoyem.com.tr/wp-content/plugins/super-forms/uploads/php/files/m3c1dp4gpqntl52sbs8ussbsi7/35805707363.pdfIn PDF document text
    • https://www.kunapak.com/wp-content/plugins/super-forms/uploads/php/files/8d3v1jm99vilf58q4409sm9jg7/6045470669.pdfIn PDF document text
    • http://archetipoingegneria.it/userfiles/files/wadekepedo.pdfIn PDF document text
    • https://asiatravel.kg/wp-content/plugins/super-forms/uploads/php/files/4f2880d60279d472c2fe161063fe81d7/sodir.pdfIn PDF document text
    • http://txextremecarts.com/userfiles/file/84189842501.pdfIn PDF document text
    • http://artmetinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607edb920ade1---rofozewigowetovoxame.pdfIn PDF document text
    • http://derma-dts.de/files/file/vokarixalijobareda.pdfIn PDF document text
    • https://www.breastcancerfoundation.in/wp-content/plugins/super-forms/uploads/php/files/1a909d5b6523d90945476ef3ca31479e/78058048017.pdfIn PDF document text
    • http://agcslohian.com/userfiles/file/vojidotetuvaveti.pdfIn PDF document text
    • https://haps.company/wp-content/plugins/super-forms/uploads/php/files/oeraglr6lk56v92i6khib9bll0/wosatovigeguxarokuzaza.pdfIn PDF document text
    • https://www.msolartop.cz/wp-content/plugins/formcraft/file-upload/server/content/files/160b537d80eee5---foremafaloxegatisope.pdfIn PDF document text
    • https://gpagroup.in/wp-content/plugins/formcraft/file-upload/server/content/files/16079b80e3b29c---nubosidepexekojogix.pdfIn PDF document text
    • http://aire-limpio.com/img/editor/file/sesopoxaxuzemumolagufezax.pdfIn PDF document text
    • https://muratay.nl/userfiles/file/96508216335.pdfIn PDF document text
    • http://associacaoguainumbi.org.br/wp/wp-content/plugins/formcraft/file-upload/server/content/files/16070feaab2619---87993932853.pdfIn PDF document text
    • https://laxmigrouppune.com/wp-content/plugins/super-forms/uploads/php/files/15eab07cd9268b7bcc37ac5f6777062e/41417843401.pdfIn PDF document text
    • https://www.northernillumination.com/wp-content/plugins/super-forms/uploads/php/files/b8ff61bf7f321abc3b7ae2904c7f716e/7896128871.pdfIn PDF document text
    • 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED96 17300 bytes
SHA-256: 353c188e00881891740146fc564190a70f30172246747d981537271cfd1f4781
font_01_sfnt_off00011b55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B55 10248 bytes
SHA-256: 73ecc8838e19069b49f17951531e985e3e1e0277b6aec7bd17e80a799c7bd058
font_02_sfnt_off00013207.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13207 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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