Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1445e52ec17ad3d…

MALICIOUS

PDF

72.0 KB Created: 2021-08-29 14:44:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: c24113c82ce0205912f9b7d8e21714f7 SHA-1: 9bce460cae7ba1862349640c727cbceaf8cc036b SHA-256: d1445e52ec17ad3d303171bdc43d15b2245064860fe7f8690d11b2794f5ca17d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, pointing to numerous URLs hosted on potentially compromised or disposable domains, suggesting a phishing or SEO manipulation scheme. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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 https://www.apollopowersystems.com/wp-content/plugins/super-forms/uploads/php/files/170ca018d0aefd509ae0f0ac2c98fdda/4037533525.pdf In PDF document text
    • http://richardchong.com/userfiles/files/dexixefelakan.pdfIn PDF document text
    • https://westcoastmovers.ca/wp-content/plugins/super-forms/uploads/php/files/db6fifp927eegn97lkst44c3hm/85234964012.pdfIn PDF document text
    • http://hvezda-pardubice.cz/files/file/xivilixapavilo.pdfIn PDF document text
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/160fae10d2c41f---joruxedemiwiwew.pdfIn PDF document text
    • http://voijin.com/userfiles/files/4016844081.pdfIn PDF document text
    • https://gyn-koe70.de/obrazky/file/58819727977.pdfIn PDF document text
    • https://sweetburden.com/upload/users/files/fuduzomovemeres.pdfIn PDF document text
    • https://stakeoutllc.com/wp-content/plugins/super-forms/uploads/php/files/7af78ce450376ce8a9d6f0eba5301669/mafivegisiwagu.pdfIn PDF document text
    • http://omniatel.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608c67e119017---munuwopixola.pdfIn PDF document text
    • http://optimus.org.au/wp-content/plugins/formcraft/file-upload/server/content/files/16084ad193dfe9---56403815072.pdfIn PDF document text
    • http://poorclarescork.ie/images/pipenerigetebu.pdfIn PDF document text
    • https://www.asahinadigital.com/wp-content/plugins/super-forms/uploads/php/files/4g8ccsnpjablo35cuagi5fuhjh/60136622383.pdfIn PDF document text
    • https://www.heainc.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fe9c679bb15---robewetojazawes.pdfIn PDF document text
    • http://sotel-perm.ru/site/file/57748629858.pdfIn PDF document text
    • https://www.kiteschule-eckernfoerde.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608bf4bacd569---46309703354.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c1f5e32879b---zesusodupobegu.pdfIn PDF document text
    • http://www.hypnotiseur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160764236a0a8e---78612053128.pdfIn PDF document text
    • http://xpressup.com/userfiles/file/52637080859.pdfIn PDF document text
    • https://a2designbg.com/userfiles/file/lurukaru.pdfIn PDF document text
    • http://worldplastsolution.com/ckfinder/userfiles/files/jipofozirelunafedodemasir.pdfIn PDF document text
    • https://buddingheights.org/wp-content/plugins/formcraft/file-upload/server/content/files/16070d013e8545---41725445521.pdfIn PDF document text
    • http://bienbao.org/uploads/files/43515653897.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=george+funeral+homePDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bab9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBAB9 15600 bytes
SHA-256: ab5be877313e70d08b08f36b311c3b1f195f547d0b3bc7065475d287ac7aba33
font_01_sfnt_off0000e2ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2EA 10444 bytes
SHA-256: 16c322f94e1dfdffdeb44756c76bc0424a551099e7c4865be7794d1ff0dcb45d
font_02_sfnt_off0000fa6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA6F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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