Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e6f6a688fd89a20…

MALICIOUS

PDF

170.7 KB Created: 2021-09-05 14:01:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 20a5b164f060c4176c6d3d39d59e9e63 SHA-1: 0667cc08c47ab209b6055725cc9148a52d610501 SHA-256: 0e6f6a688fd89a2099b99cb2c4c796f8ce29c2c5c96db92c79fa6669c1393b74
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to websites hosted on compromised CMS platforms, indicating a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly suggest malicious intent. No scripts were extracted, but the structure and embedded URLs are indicative of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://cosalesrep.com/wp-content/plugins/super-forms/uploads/php/files/3e7d132aeb9c11d613a617d729aa8c79/lonikazag.pdf In PDF document text
    • https://www.americanapi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611d055b1a6ef---fekifapawulofixanu.pdfIn PDF document text
    • https://yournew.site/wp-content/plugins/super-forms/uploads/php/files/botld73p57mijlqgtmt47qpaan/65231644540.pdfIn PDF document text
    • http://frangarcia.eu/upload/file/57257165858.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/2b5a515a1b426e1981b36ae3f10bf4d5/89868363281.pdfIn PDF document text
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612889c20d767---bumanok.pdfIn PDF document text
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/d6cee17aeed8a87ef8f1d87088d890ed/49467934103.pdfIn PDF document text
    • https://silverwayshipping.com/userfiles/file/zosojav.pdfIn PDF document text
    • http://tolaniprojects.com/userfiles/file/nexoxipagukawon.pdfIn PDF document text
    • http://espacioschillout.es/images/admin/file/rubugo.pdfIn PDF document text
    • http://wernersuarez.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/61569472042.pdfIn PDF document text
    • http://www.moteco.ro/wp-content/plugins/formcraft/file-upload/server/content/files/161167cf8930b2---zesevaredevabevedikajizut.pdfIn PDF document text
    • http://letdentalab.com/img/files/fetaxobaduku.pdfIn PDF document text
    • http://sun-dr.com/uploads//files/202108101350569529.pdfIn PDF document text
    • http://www.hcibatiment.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16079b2dbded2f---37484392851.pdfIn PDF document text
    • https://dietacud.eu/upload/file/bakanexadamulod.pdfIn PDF document text
    • http://asupuro.com/user_data/image//file/nozewevado.pdfIn PDF document text
    • http://www.kinoimaging.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160725a7361215---woxabezax.pdfIn PDF document text
    • http://agenziaimmobiliarecannavo.eu/userfiles/files/vumusov.pdfIn PDF document text
    • http://cedresarquitectura.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d24a4ac960d---32319171179.pdfIn PDF document text
    • http://stkvn.ru/wp-content/plugins/super-forms/uploads/php/files/10b58a0cfa6a12d495df750d7f15a9e3/70692896650.pdfIn PDF document text
    • http://haustechnik-hagenauer.at/baguxopexifewipizisekupob.pdfIn PDF document text
    • http://bhavalaya.org/ckfinder/userfiles/files/jeloradarares.pdfIn PDF document text
    • http://abwva.com/uploads/files/miluxexenifan.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=warhammer+40k+chaos+codex+8th+pdfPDF 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_off00023527.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x23527 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00024d3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x24D3E 11240 bytes
SHA-256: 3693ff0b506a6d6ec8d07f4797269ec9cf52b05471af7e20e43c77f23c54cde2
font_02_sfnt_off000267ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x267AE 20176 bytes
SHA-256: 8342f584815cee03bc97c11d9cefe079b9591d96e0b6481d6dd3016a8551117e

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