Malicious PDF — malware analysis report

Static analysis result for SHA-256 a079d902006ee8af…

MALICIOUS

PDF

74.7 KB Created: 2021-09-04 14:10:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 75fb7a777625282e5a687b5ffceb26fc SHA-1: d7d37a9f5d8d28c1abf6c3878d84a4066452f297 SHA-256: a079d902006ee8afc35c3d91e6b5326d505f500df9682483aeb5e3286e8ce112
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The document functions as a link farm, containing numerous URLs pointing to compromised websites and disposable hosting, likely intended to redirect users to phishing or malware distribution sites. No scripts were extracted, but the presence of multiple external URIs and the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic strongly suggest a phishing or SEO poisoning attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 https://drafthe.ru/uplcv?utm_term=gateway+in+computer+network+pdf PDF link annotation
    • http://duetsepolno.pl/userfiles/file/97376317660.pdfIn PDF document text
    • https://surupaceanu.ro/ckfinder/userfiles/files/rideredasuturaliz.pdfIn PDF document text
    • http://parkwestresidences.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074026d1038f---bukijolebalif.pdfIn PDF document text
    • https://www.pennlighting.com/wp-content/plugins/super-forms/uploads/php/files/c019bf347d22748bf740512225adc6f8/90702896999.pdfIn PDF document text
    • https://mamproducciones.es/wp-content/plugins/formcraft/file-upload/server/content/files/1607c6c7cafc51---ririrewowom.pdfIn PDF document text
    • https://powerseas.net/userfiles/file/4379817379.pdfIn PDF document text
    • http://evabody.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160b46d1a4c922---mowafovivewefojivo.pdfIn PDF document text
    • https://feriaesotericadeatocha.com/wp-content/plugins/formcraft/file-upload/server/content/files/160881a8003574---tovavipejegilabivatu.pdfIn PDF document text
    • http://interstroy96.ru/uploads/files/wuvulebepusur.pdfIn PDF document text
    • https://www.peeryhotel.com/wp-content/plugins/super-forms/uploads/php/files/5db1b83823f8ce6cd753a5cb0451c2f2/64869652613.pdfIn PDF document text
    • https://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5f1a2ded99---1584392454.pdfIn PDF document text
    • http://safarekhoob.ir/basefile/safarekhoobir/files/35403836791.pdfIn PDF document text
    • http://onlinecommerce.bg/uploads/pages/files/297677856.pdfIn PDF document text
    • https://adbetelparaguay.com/wp-content/plugins/super-forms/uploads/php/files/d55e1c185daeb4e15ca6dc5aed3df27a/sofapozakomana.pdfIn PDF document text
    • http://brothersaluminium.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/1609d16547a052---segopipami.pdfIn PDF document text
    • https://graffitipaintstudio.com/wp-content/plugins/super-forms/uploads/php/files/df9b989520adb7e1253c6e2e92b3759f/xinet.pdfIn PDF document text
    • https://skl.deindrukdemo.nl/upload/files/duvojigejisuxo.pdfIn PDF document text
    • https://eliteswimmingpoolsinc.com/wp-content/plugins/super-forms/uploads/php/files/0mj690l4tls3k5ummv7io1dac1/xawewexigiwirediwetu.pdfIn PDF document text
    • http://www.1atlanticfunding.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2ada6ad4a2---75988663100.pdfIn PDF document text
    • http://dga.gr/ILC/img/file/vozuwufuxobodaze.pdfIn PDF document text
    • http://dedanskecasinoer.dk/userfiles/file/50799209508.pdfIn PDF document text
    • https://wrd13.com/force/file/piluvinuwopowoxomudafob.pdfIn PDF document text
    • 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_off0000c11d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC11D 10996 bytes
SHA-256: c2ab17e472d6f9ea0de78d8a0a2ccc2d67b25a5073617f9f9215e1e2f9c80eb8
font_01_sfnt_off0000dac2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAC2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f2d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2D4 16688 bytes
SHA-256: 1c749ce1b1c21de7bddbaba702dc55a3823e07a0092bdb5453a50d0810514844

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