Malicious PDF — malware analysis report

Static analysis result for SHA-256 260677c087e24893…

MALICIOUS

PDF

88.4 KB Created: 2021-08-01 23:03:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: fb463dc7a991c88c21e9f6190721f178 SHA-1: 96d253cc0677b79fb81258c1e1dc81fff45fda04 SHA-256: 260677c087e2489397b117e3486167b5af6b0ea21e5beee7771991a10f66eddf
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links pointing to compromised WordPress sites and other domains, indicating a link farm designed to distribute malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware delivery. No scripts were extracted, but the presence of numerous external links and the 'Urgency/Deadline' heuristic suggest a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://sokolzgierz.pl/web/uploads/files/rulizitut.pdf In PDF document text
    • https://promaxsuspension.com/csmimage/file/gitubozunuso.pdfIn PDF document text
    • http://ptairsupply.com/userfiles/file/gimawupunu.pdfIn PDF document text
    • http://www.driftime.ee/wp-content/plugins/formcraft/file-upload/server/content/files/160828a9e1aacc---40448845217.pdfIn PDF document text
    • https://responsible-tourism-alliance.com/content_file/files/nujorivufemigufejikanetof.pdfIn PDF document text
    • https://www.hediyevideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160821429d110b---fujozelilowodexatuf.pdfIn PDF document text
    • https://leesman.com/wp-content/plugins/super-forms/uploads/php/files/af460fa0d7494cda3b64b490ffafb3bc/wefinukifevuge.pdfIn PDF document text
    • https://africanresearchcenter.com/userfiles/file/95802381771.pdfIn PDF document text
    • https://robertmatzuzi-massagetherapist.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1606cfcaf1c9d8---lenuvebif.pdfIn PDF document text
    • http://maxitelt.no/wp-content/plugins/formcraft/file-upload/server/content/files/1607365f1afc64---zuwevaweke.pdfIn PDF document text
    • https://beautifullifeuk.com/wp-content/plugins/super-forms/uploads/php/files/ceb325d91862a2117cb70363b1d9c2b4/desumusuruzifogogunos.pdfIn PDF document text
    • http://fiumevivo.it/userfiles/files/39019770135.pdfIn PDF document text
    • https://datajournonepal.org/files/41106168265.pdfIn PDF document text
    • http://marthomaiticherukole.com/userfiles/file/30920880895.pdfIn PDF document text
    • https://dezsredstvompx.ru/wp-content/plugins/super-forms/uploads/php/files/30097789c05e477a9c83373b3a284c97/xukaxojajekexo.pdfIn PDF document text
    • https://webhostmurah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bace50e687c---tiwibilaxad.pdfIn PDF document text
    • https://akvaguru.hu/user/file/6812249162.pdfIn PDF document text
    • http://dooroc.com/tk/upload/file/mizokusadofoli.pdfIn PDF document text
    • https://atcotourismtravel.com/userfiles/file/visetizixutu.pdfIn PDF document text
    • https://marciasmithconsulting.com/wp-content/plugins/super-forms/uploads/php/files/a22b7860ffd2badf0c0bccd0144b5f2f/xuvajetujuwubiroja.pdfIn PDF document text
    • http://usmleworkout.com/files/file/vadofijewixifebilox.pdfIn PDF document text
    • http://xn--80aesyq.xn--p1acf/files/file/darovagoko.pdfIn PDF document text
    • https://discoverapartmentsforrent.com/wp-content/plugins/super-forms/uploads/php/files/415d969d442f12c541c706d7a9ae8056/55617672698.pdfIn PDF document text
    • https://monacollection.ua/wp-content/plugins/super-forms/uploads/php/files/822d9dc65c8281c4f487a4590b67db26/sufamobijagipibipovu.pdfIn PDF document text
    • https://ratsimae.ee/media/contents/file/39386475484.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=el+paso+police+dept+arrest+photosPDF 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_off0000f4bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4BC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010cd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CD3 10488 bytes
SHA-256: c4512dbe62c23cf41718c27e7dd083e004521718ca932a1a0eb31bbab531aaae
font_02_sfnt_off000124c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124C6 17900 bytes
SHA-256: 025f042aa1722530acbf145e24fd97d94c567dfdc7a91681b0bfd077452f1d56