Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e2da96eeeaef59f…

MALICIOUS

PDF

92.3 KB Created: 2021-08-09 16:45:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 8f3f33985a92acf51cf10e8df8b92a3b SHA-1: fe119cf902f24336b4ecd9e54f3d44a96a984fd4 SHA-256: 7e2da96eeeaef59f22146df4a37c2a608a6b27d6b066250f78f6aabe7b8e264c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file is identified as a malicious PDF by multiple heuristics and a machine learning classifier, with ClamAV detecting it as Pdf.Phishing.Trojan. The PDF contains numerous links, many pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of external URIs and link farms indicates an attempt to lead users to phishing pages or download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://www.lorenzofranzone.it/wp-content/plugins/super-forms/uploads/php/files/85b4bca6faefc2cd7d26cda6f923e4d4/43749662583.pdf In PDF document text
    • https://jiptv.nl/wp-content/plugins/super-forms/uploads/php/files/l2o8r3b8r95fu0m97vd1u164of/depex.pdfIn PDF document text
    • http://hyperasp.net/userfiles/file/ripezomibolofekir.pdfIn PDF document text
    • http://hongdanhaudio.com/luutru/files/rigunexidopoguniwupurebu.pdfIn PDF document text
    • https://wita.lt/images/files/15654826186.pdfIn PDF document text
    • https://www.olympusnorge.no/wp-content/plugins/super-forms/uploads/php/files/o6odc8e7kf1lgm5agu51vv7b1v/mixofunivoga.pdfIn PDF document text
    • http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6b91d33ae9---80282059837.pdfIn PDF document text
    • https://unitedcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b9521e7dc83---45748931148.pdfIn PDF document text
    • http://www.anclupnapoli.it/userfiles/file/73151954305.pdfIn PDF document text
    • http://archiprojektai.lt/app/webroot/uploads/userfiles/files/nujuminabazipuwemadida.pdfIn PDF document text
    • https://stefandes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610fd2288a344---9108909561.pdfIn PDF document text
    • https://veritiesinstitute.com/wp-content/plugins/super-forms/uploads/php/files/caa23261767be70afb87b692abcd41c9/kamixibegilabesugiwa.pdfIn PDF document text
    • https://playgametoday.ru/wp-content/plugins/super-forms/uploads/php/files/ef2eb3163f3c3e72a89b5f09dfc13b7a/kewefuxetulafuxemol.pdfIn PDF document text
    • https://readxyz.org/wp-content/plugins/super-forms/uploads/php/files/c28c6a0e74e112ddd3a9d54a72be4305/tewoxozalozugoxodeke.pdfIn PDF document text
    • https://ambalatender.com/upload/files/nosenutafupej.pdfIn PDF document text
    • http://truhlarstvisollner.cz/data/file/gagewow.pdfIn PDF document text
    • https://vicotelecom.vn/static/source/images/file/54220908997.pdfIn PDF document text
    • http://taborcapitalpayment.com/clients/d/d0/d0a3925ee25d0adc8806453b18bccccc/File/75796772744.pdfIn PDF document text
    • http://agnieszkapawlik.com/userfiles/file/goxujosogijarivemivoripag.pdfIn PDF document text
    • https://qualitylightsolutions.com/wp-content/plugins/super-forms/uploads/php/files/e372916411a27eeb93461bd2261540ad/20470948898.pdfIn PDF document text
    • http://alphanaturehk.com/userfiles/file/66503705255.pdfIn PDF document text
    • https://www.guestquesttravelmedia.com/wp-content/plugins/super-forms/uploads/php/files/5940cutdsn9l4p5nrlvbgjcmnt/senakuvoxazidazisi.pdfIn PDF document text
    • https://avenirpourtous.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160802269d4e78---82043974570.pdfIn PDF document text
    • http://st-ark.it/userfiles/files/zetud.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=what+is+file+format+for+audio+cdPDF 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_off000102d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102D5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011ae7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AE7 18472 bytes
SHA-256: 6dc99371f2f38fe301d8d82b67c67c8bb59f89b41e3a7d83fe6db055ab515d95
font_02_sfnt_off00014a3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14A3B 10728 bytes
SHA-256: a8676b77865cddf00389cf55fce834403cac461ccdbb04ac3b91626bb58746fb

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