Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d12f2eae8ae78bd…

MALICIOUS

PDF

90.4 KB Created: 2021-06-27 18:54:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 28ade3ecc6d8d782e2fa57b09bfe4305 SHA-1: 4574f5203cbe1630e274d2b697febc01b7670ad2 SHA-256: 7d12f2eae8ae78bd0da0b8af3706415bd3fb341fa304abb0fdab82a9fcf81667
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file was detected as malicious by ClamAV and an ML classifier, exhibiting characteristics of a link farm. It contains numerous URLs pointing to compromised WordPress sites and disposable domains, suggesting an attempt to lure users to malicious content. The PDF structure and embedded links are indicative of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/mimd76n5inrhk6ihkhf4mkjk20/pizogulanepevixunuzox.pdf In PDF document text
    • http://graphicyazd.com/ckfinder/userfiles/files/1262010560.pdfIn PDF document text
    • https://la-klamm.org/userfiles/file/jamedubaxataxevesup.pdfIn PDF document text
    • https://cremeconferences.com/wp-content/plugins/super-forms/uploads/php/files/4d91d5c9a324172d757e54553ce0421c/kadomopizisolurodaw.pdfIn PDF document text
    • http://aimic.com/userfiles/file/57557899355.pdfIn PDF document text
    • http://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ee2a93b028---45555631239.pdfIn PDF document text
    • https://samiznojmo.cz/wp-content/plugins/super-forms/uploads/php/files/cb09866192de952b8c3e9879fc4fd5a8/mamijivuzikipakirim.pdfIn PDF document text
    • https://thepetrichortouch.com/wp-content/plugins/super-forms/uploads/php/files/4t9srch729u5sejfcgc9n8l5vb/waforinokogexajureguwudif.pdfIn PDF document text
    • http://vincityhomes.vn/wp-content/plugins/super-forms/uploads/php/files/9e3m3prdn0h2bpogitlckdf8f8/66130500546.pdfIn PDF document text
    • http://www.kocay.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1608888f716144---20263647578.pdfIn PDF document text
    • http://kirilmazbardak.com/userfiles/file/kubewogekenenebuvisilit.pdfIn PDF document text
    • https://fibaquitaine.fr/cebatrama/userfiles/files/motivi.pdfIn PDF document text
    • https://nutricionintravenosa.com/wp-content/plugins/super-forms/uploads/php/files/8c930b7b6ef26e1290cb2a89ba9ec72d/45644410061.pdfIn PDF document text
    • https://alihuata.com/userfiles/file/pelofu.pdfIn PDF document text
    • http://reiki-roots.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160856103eca24---94926134494.pdfIn PDF document text
    • http://www.alwaysflorida.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f28ace6d9c---40665505100.pdfIn PDF document text
    • http://hakkabrothers.com/userfiles/file///xixitafidelenikafilazilej.pdfIn PDF document text
    • http://milcontabil.com.br/wp-content/plugins/super-forms/uploads/php/files/rrivul2nbh3u2ju18ad3t2a4b1/40915553646.pdfIn PDF document text
    • http://aberdeeneyes.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16071ec7c49cd9---widulajusojogoluluxut.pdfIn PDF document text
    • https://pinotcar.com/wp-content/plugins/super-forms/uploads/php/files/022575e2b5fcbdf2e5f93c7fd813263d/pamamog.pdfIn PDF document text
    • http://thesnowmanicecream.com/ckfinder/userfiles/files/gudazub.pdfIn PDF document text
    • https://talaa-obour.com/webmisr/uploadwebmisr/file/lazowagopoboxukijajavubim.pdfIn PDF document text
    • https://accesoriosalmayor.com/images/userfiles/file/24400244271.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=jobs+for+people+with+history+degreesPDF 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_off0000fef8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEF8 17080 bytes
SHA-256: 155f12d67c7e86087b0e1d2c92619935d05f0c0fd14fc130bd830eb9ef35b365
font_01_sfnt_off00012b5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B5C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014373.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14373 10844 bytes
SHA-256: 7976d25e71e04ec7e0b2b4aa3e8b09cb149bb74c6ab121a593a73df0a8871caa

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