Malicious PDF — malware analysis report

Static analysis result for SHA-256 be1094fd516fa960…

MALICIOUS

PDF

70.3 KB Created: 2021-09-23 08:22:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 7ff9a14a0a7754631a42fae84a95457f SHA-1: bd89e33afa5db339685ffbdd6a5606373be8b272 SHA-256: be1094fd516fa9609f066c1024c76d1d41806477b442f4758ff3fa7ab3160ad6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, with many embedded URLs pointing to various websites, some of which are hosted on compromised WordPress sites. This suggests an attempt to lure users to potentially malicious content or phishing pages, consistent with spearphishing attachment tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9849

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/d06d9ded16dce244059bf7bcc6feefa7/kejifaluvakud.pdf In PDF document text
    • http://ventexevent.se/uploads/file/xizeritalonimedusidotaz.pdfIn PDF document text
    • https://djecijagarderoba.me/userfiles/file/42907426250.pdfIn PDF document text
    • https://electroagro.es/pub/files/tizidivotujosawegigugun.pdfIn PDF document text
    • https://www.pension-chevaux-haras-gabereau.fr/ckfinder/userfiles/files/jusobibafeje.pdfIn PDF document text
    • http://becro-plast.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1614751b58bb12---90094350227.pdfIn PDF document text
    • https://butyfarm.mm520.net/userfiles/files/15230903145.pdfIn PDF document text
    • https://dolnoslaskialarmsmogowy.pl/imgturysta/files/nimajofo.pdfIn PDF document text
    • http://cutskytools.com/d/files/wefarakidogixeruxi.pdfIn PDF document text
    • http://zgic.ru/!upload/files/jeniparumajufiz.pdfIn PDF document text
    • https://rh-h1tapi-turbo.com/contents/files/80278582489.pdfIn PDF document text
    • http://immobilieninvestors.com/userfiles/file/buxewapo.pdfIn PDF document text
    • https://www.tifdip.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614b3b71975c1---bubawikideso.pdfIn PDF document text
    • http://hidrometa.com/images_upload/files/44622623975.pdfIn PDF document text
    • http://bfr-bialapodlaska.pl/userfiles/file/66490785694.pdfIn PDF document text
    • http://alanaf.ru/userfiles/files/20147243712.pdfIn PDF document text
    • http://olgapolyakova.de/files/files/jabixozapaki.pdfIn PDF document text
    • http://rtm-plus.com/ckfinder/userfiles/files/tijojewaru.pdfIn PDF document text
    • https://suma.ca/upload/editor/file/tajafibigil.pdfIn PDF document text
    • https://k31szmq42-nu28.com/contents/files/pekon.pdfIn PDF document text
    • https://giyimkent.formenemlak.com/upload/ckfinder/files/sixojexekopiwalobosadomun.pdfIn PDF document text
    • https://simovi.mx/wp-content/plugins/formcraft/file-upload/server/content/files/16133f70fe8330---bopolubiw.pdfIn PDF document text
    • http://chandigarhdatarecovery.com/files/file/ritofupigoxoxobi.pdfIn PDF document text
    • http://www.playerclub.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1614279556a212---36711294964.pdfIn PDF document text
    • https://telechips.com/ckfinder/userfiles/files/5893576074.pdfIn PDF document text
    • https://inlandautorepairmurrietaca.com/wp-content/plugins/super-forms/uploads/php/files/64eb9ab3c01ddd51ca10adceebdcfb5e/pexezi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=aimbot+for+fnfPDF 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_off0000b4e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB4E9 9988 bytes
SHA-256: d7a62a0324692614844797e9997d542c931a805576c60b3f7b529d8f385bb025
font_01_sfnt_off0000caf6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAF6 15844 bytes
SHA-256: 4cbe7d05949fd2996bb2e7e86ad0227b9d625845b22296d9c1fa4a677f1910ae
font_02_sfnt_off0000f2a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2A5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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