Malicious PDF — malware analysis report

Static analysis result for SHA-256 773f224426354434…

MALICIOUS

PDF

86.8 KB Created: 2021-07-15 21:36:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: a77e3972e7d669232c0ad25096fbe7e8 SHA-1: d1c28ac50df73dd5306cb207e45b33200d9645a5 SHA-256: 773f22442635443481f36f4671ba47ec0e3c5ac3ec11996e43ec35b79952f485
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a link farm with numerous URLs pointing to potentially compromised websites, likely intended to lure users into downloading further malicious content or submitting sensitive information. No scripts were extracted, but the PDF structure and embedded links suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9848

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://aryajob.com/user_upload/file/rogapilifotavedevamusi.pdf In PDF document text
    • https://oneremote.ru/wp-content/plugins/super-forms/uploads/php/files/43807d01f10d627547b1be067d10f61d/1117851831.pdfIn PDF document text
    • http://capitolmetrophysicaltherapy.com/userfiles/file/jajezazapose.pdfIn PDF document text
    • https://englewoodgrassfarm.com/wp-content/plugins/super-forms/uploads/php/files/8b87595715365e77dd250ed0c6f313f5/soramubiju.pdfIn PDF document text
    • http://auksozvynas.lt/userfiles/file/govilixeponuminibadinoli.pdfIn PDF document text
    • https://flyags.com/editorResources/file///69136560185.pdfIn PDF document text
    • https://csom.cz/wp-content/plugins/super-forms/uploads/php/files/d893b97b74cfdb0c0771607779aff313/742036598.pdfIn PDF document text
    • http://www.ddd-iasi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160e9866d04759---36889006877.pdfIn PDF document text
    • http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/2q4di2g553jbjlpif2kdpim50c/94310387833.pdfIn PDF document text
    • https://www.finestkindcharter.com/wp-content/plugins/formcraft/file-upload/server/content/files/160886af262f4f---57709798875.pdfIn PDF document text
    • http://unipell.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160797e1509022---sezumabodum.pdfIn PDF document text
    • http://sakuragiramenandsushi.com/uploads/files/kodon.pdfIn PDF document text
    • http://eske.hu/wp-content/plugins/formcraft/file-upload/server/content/files/1606c85301b2f4---jilotixelegusiwi.pdfIn PDF document text
    • http://daotaonhaccong.com/uploads/userfiles/file/nodakonavirekinagowogakaf.pdfIn PDF document text
    • http://staractivecollection.com/resimler/site/files/96978235865.pdfIn PDF document text
    • https://www.tctnanotech.com/wp-content/plugins/super-forms/uploads/php/files/6041dfa36b8a36da1d02ed7427eafaa5/50831241035.pdfIn PDF document text
    • https://gomaihoa.net/upload/files/68071258034.pdfIn PDF document text
    • http://indel.sk/userfiles/file/84094690538.pdfIn PDF document text
    • http://qunjl.com/userfiles/files/somovinanusawez.pdfIn PDF document text
    • http://movietek.vn/hinh-anh/files/kumavatiko.pdfIn PDF document text
    • http://studiotecnicomartani.eu/userfiles/files/88954363033.pdfIn PDF document text
    • https://skvely-kup.cz/files/file/pozesixoxeze.pdfIn PDF document text
    • https://thejinglelab.com/wp-content/plugins/super-forms/uploads/php/files/jskq1dmc3t0414h4kro1235187/dotiponi.pdfIn PDF document text
    • http://mysistermyfriendministries.org/clients/85776/File/41399321185.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b2e512b14e6---wulananavaxi.pdfIn PDF document text
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/9c781046162eff87b3abac82c2a3a10c/83814915152.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=who+was+awarded+the+first+official+gold+recordPDF 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF4A 10728 bytes
SHA-256: 311230c8e9ec46f4c6c8ae7baf7a57dd22fd20370a55592f002aa35d8fc4ca2b
font_01_sfnt_off000107f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107F1 17524 bytes
SHA-256: 074296856b2444705590f472a0571d0e95520386a0b61fe83ab072b1f9ca655c
font_02_sfnt_off000135df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x135DF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1