Malicious PDF — malware analysis report

Static analysis result for SHA-256 fec010125b5f3445…

MALICIOUS

PDF

100.5 KB Created: 2021-07-24 17:10:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: fbc921f29320f240ffa4fc0c92a2857d SHA-1: 82108302454ae2ed00c42b1647d74dab8c1e61e4 SHA-256: fec010125b5f344588102c6632f2b2b6ac246c813fdd51c50dca78942976eb91
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as a malicious PDF by ClamAV and an ML classifier. It contains numerous embedded URLs pointing to compromised WordPress sites, indicating a link farm designed to lead users to malicious content. The presence of these links suggests an attempt to lure victims into clicking through to potentially harmful destinations, consistent with phishing or malware distribution tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9979

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://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086bacce1b68---fudorixoda.pdf In PDF document text
    • https://www.accidentinjuryalbuquerque.com/wp-content/plugins/super-forms/uploads/php/files/1olfsd1a6g6ug4j2ia1f7ihl3s/24117861809.pdfIn PDF document text
    • https://baodinhsolar.com/wp-content/plugins/super-forms/uploads/php/files/co37f19jotq8va6v6tbkiasatt/90171905316.pdfIn PDF document text
    • https://kindliving.org/wp-content/plugins/super-forms/uploads/php/files/tmp/53067633727.pdfIn PDF document text
    • http://lilit-realty.com/wp-content/plugins/super-forms/uploads/php/files/8b3jhej2togrjns8fjsl28r4m6/zokejadu.pdfIn PDF document text
    • https://floorco.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/2f2d83e8083d544420b860854bc75bc2/56070896505.pdfIn PDF document text
    • http://soepcentrale-dekeyser.be/userfiles/file/5020490658.pdfIn PDF document text
    • http://hyundaidongdo3s.com/images/files/11307384545.pdfIn PDF document text
    • http://unseretochter.ch/images/file/jozujisuxemazuxulinol.pdfIn PDF document text
    • https://brusroom.com/wp-content/plugins/super-forms/uploads/php/files/ffbe229b681c04e98ecff71cf4ff5f5d/98491310444.pdfIn PDF document text
    • https://ipcare.nl/wp-content/plugins/super-forms/uploads/php/files/d3r844oji1btt6uuf18o4s8u14/90868490042.pdfIn PDF document text
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/a71158d2f36ae759793431da4c25701b/jepadaxuvakigapejavogibot.pdfIn PDF document text
    • http://liavanhaeringen.nl/userfiles/files/tezavojudatifek.pdfIn PDF document text
    • http://hykylalumni.org/userfiles/19779160624.pdfIn PDF document text
    • http://b-solutions.net/userfiles/file/4117500497.pdfIn PDF document text
    • http://supermarketdv.ru/files/file/45912369364.pdfIn PDF document text
    • https://leesman.com/wp-content/plugins/super-forms/uploads/php/files/f632754af09b0251c4b7a743c1108510/51545280917.pdfIn PDF document text
    • http://cohn-vossen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160709de0cca18---rusomuvawufifavotiwixitaj.pdfIn PDF document text
    • http://hodinovysoused.cz/upload/file/96695497326.pdfIn PDF document text
    • https://118highschool.am/wp-content/plugins/super-forms/uploads/php/files/147a8a6d37b1b1800796e9f54cc904f0/92012253013.pdfIn PDF document text
    • https://3dreamvr.com/wp-content/plugins/super-forms/uploads/php/files/dd080bc41fba11bdd52d090068096a3d/pozifutitoruxi.pdfIn PDF document text
    • https://jfefood.com/wp-content/plugins/super-forms/uploads/php/files/ff4d775e24e821533efe6baa7c8b5916/49827326558.pdfIn PDF document text
    • http://exima.kr/userData/board/file/jadovuz.pdfIn PDF document text
    • http://zs-oilfieldequip.ru/d/files/38386864413.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=who+form+the+first+trophic+level+in+an+ecosystemPDF 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_off00012004.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12004 10916 bytes
SHA-256: 5595f8713582a3abff646c2a302de272da490aeae304f63cf044a4c1d4ef274f
font_01_sfnt_off00013936.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13936 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00015148.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15148 19200 bytes
SHA-256: 8a9de9d6598bb897b3503dbe329b94b10a824e41a4ea7b17cf4767e632a48f3b

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