Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f60b2a7157f7713…

MALICIOUS

PDF

84.6 KB Created: 2021-09-19 15:32:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 49e302b90e854ef79a08a754f4306c3e SHA-1: 3ffa2e74b20ddc0eced6b659480103dbea236622 SHA-256: 0f60b2a7157f7713d507094b8902f9ffb1805d9b68a26453cb66695c3a97d341
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious. The 'SE_BROWSER_INSTALL_LURE' heuristic indicates the document's content likely prompts the user to install a browser extension or update. This is a common social engineering tactic used to deliver malware or steal credentials. The numerous embedded URLs, many hosted on compromised or disposable domains, suggest a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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://philabc.ru/uplcv?utm_term=how+do+i+take+a+screenshot+of+something+on+my+phone PDF link annotation
    • http://rowadhr.com/app/webroot/upload/files/90903698326.pdfIn PDF document text
    • https://sahodayabbsr.com/test/fckeditor/file/nelugesulopifozibo.pdfIn PDF document text
    • http://bjhtdszdh.com/v15/Upload/file/2021914555205512.pdfIn PDF document text
    • http://livestreaming.group/wp-content/plugins/super-forms/uploads/php/files/lqnnpt2t1vddbm78tgac98p9nhifbqce/42300769393.pdfIn PDF document text
    • https://altaitur.com/ckfinder/userfiles/files/71375145486.pdfIn PDF document text
    • http://invismortgagebroker.com/images/file/74955029462.pdfIn PDF document text
    • https://brusroom.com/wp-content/plugins/super-forms/uploads/php/files/4733a0f72c49cc96358647d6931023f2/5520530036.pdfIn PDF document text
    • http://careerhack.net/wp-content/plugins/formcraft/file-upload/server/content/files/161448a24938ab---pitibilukesix.pdfIn PDF document text
    • https://sharzh-ufa.ru/wp-content/plugins/super-forms/uploads/php/files/da09cf001623c53c08e15bbc1afa450e/vogazerinef.pdfIn PDF document text
    • http://architettosbaffo.com/userfiles/files/61329353318.pdfIn PDF document text
    • https://kochitaxirental.com/ckfinder/userfiles/files/kusanabokubutetubevibod.pdfIn PDF document text
    • https://cafemocion.com/userfiles/file/jotaku.pdfIn PDF document text
    • http://mrpennarak.com/user_file/file/37488439684.pdfIn PDF document text
    • http://prestinoequitacion.com/imagenes/upload/files/zavukepekav.pdfIn PDF document text
    • http://gotoippc.com/ckfinder/userfiles/files/solujezuwonivukadafuweli.pdfIn PDF document text
    • http://angelojrobles.com/admin_initial_test/userfiles/file/16266605614.pdfIn PDF document text
    • http://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613810b0aeab8---84537486153.pdfIn PDF document text
    • https://triangle-electronics.com/assets/userfiles/file/60673204827.pdfIn PDF document text
    • http://runnersavezzano.it/public/userfiles/file/sigetowunotepul.pdfIn PDF document text
    • http://poultech.net/d/files/dirivomejelus.pdfIn PDF document text
    • http://kawana.tech/userfiles/file/zubaledimadadebapetuma.pdfIn PDF document text
    • https://bccphil.paramedix.biz/uploadfiles/file/56096973949.pdfIn PDF document text
    • http://ginzaoakland.com/uploads/files/zazigofal.pdfIn PDF document text
    • http://chiangmai-clean.com/user_img/files/suluwewokosalovodipo.pdfIn PDF document text
    • https://samowar.me/upload/file/dofejodefutosu.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_off0000e2ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2ED 18092 bytes
SHA-256: 912031e17fb6e60da4b344cd486e52e7a809a328054db782aff6a345387916f5
font_01_sfnt_off000111d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111D0 11304 bytes
SHA-256: 7dbecde8ea224f16aca548e5c4c681e7eca61c2a40fad892d675528a26a7ebce
font_02_sfnt_off00012c05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C05 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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