Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ad3ba7db7dfa8a3…

MALICIOUS

PDF

91.0 KB Created: 2021-07-08 12:30:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: fd0451b3b28fdac81d64d204641cbaca SHA-1: 3c47748e2c417297b7249335262d89f5e8d19d8d SHA-256: 7ad3ba7db7dfa8a3c8c110641a8383491e25d63e31d7e79b0df9ed7bf4d2a94c
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and multiple links, many pointing to compromised WordPress sites, suggesting an attempt to redirect the user to malicious content. The heuristic 'SE_ADVANCE_FEE_SCAM_LURE' strongly indicates the document's purpose is to trick users into a financial scam by promising a prize or parcel delivery. The ML classifier and ClamAV detection further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://3duct.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af36b0a406b---xagokilugemawow.pdf
    • https://advancedbusiness.co/wp-content/plugins/super-forms/uploads/php/files/92398c4cfbc5933cff0d135104e5716a/97081407682.pdf
    • https://www.kasekimi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071835ddc443---68880650678.pdf
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/07e82acb2f06ed23e038805e2babe02b/tevexejefifafolegiw.pdf
    • http://www.whirlpool-beachcomber.at/wp-content/plugins/formcraft/file-upload/server/content/files/160d209ff1c0e9---woruwovapizomokazedumado.pdf
    • https://alteanetworks.fr/img/file/lakupuzotojutibijorubadi.pdf
    • http://scantech3d.com/files/fubosig.pdf
    • https://www.lightingdynamics.com/wp-content/plugins/super-forms/uploads/php/files/1f37de3f4ba822890cff32ad9ac2db75/sujexufun.pdf
    • https://alphaveneers.co.uk/wp-content/plugins/super-forms/uploads/php/files/53443fe9b6fa5b0014c7e78619984214/zuwimofanirefajupuvenosed.pdf
    • https://www.brightfieldbusinesshub.co.uk/wp-content/plugins/super-forms/uploads/php/files/23a88g1bccr90jelnojb7g9ubd/xavejiv.pdf
    • http://hkt-optics.com/hkt/images/userfiles/file/27808854246.pdf
    • http://www.atrium-tuiles.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087b382945a1---43848821276.pdf
    • https://myphambambi.com/webroot/img/files/79125310686.pdf
    • https://imahima.xyz/js/ckfinder/userfiles/files/79932763546.pdf
    • https://enville.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e0a8ccf21de---velovokinagokivizumoba.pdf
    • https://www.criteriainvest.com.br/wp-content/plugins/super-forms/uploads/php/files/mm719ic3sc7m1nc79pcbogk60j/kedixevifuko.pdf
    • https://agmatbaa.com/upload/files/54260877502.pdf
    • http://turatabor.hu/media/64160330347.pdf
    • https://marciasmithconsulting.com/wp-content/plugins/super-forms/uploads/php/files/abfa734be9962beb16b41c22836026e7/sesuzi.pdf
    • http://turagent007.ru/userfiles/file/1816477668.pdf
    • https://dudikom.pl/userfiles/file/tubivezaxasasipunuwodu.pdf
    • http://akvari-um.ru/userfiles/file/86957226635.pdf
    • http://mhfmjournal.com/data/22/2/55/64/2544879/user/2788947/htdocs/userfiles/file/58380860315.pdf
    • https://ilc.ua/wp-content/plugins/super-forms/uploads/php/files/dhgp0es4ksa2vbeecm32rgi7i0/lunikiximekujibukewozug.pdf
    • http://idroter.org/userfiles/files/10435702416.pdf
    • https://postscriptproductions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d31150ce26---siresomizidevosap.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=plant+physiology+mcq+pdf+for+neet
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fb17.bin
8abd59378dc85220c060721ab1b07439b6137db5417185fddf308af8a1fffeb3
pdf-font-stream PDF embedded font (sfnt) at offset 0xFB17 18732 bytes
font_01_sfnt_off00012ca6.bin
452be349008aa75692c93d6aeaf22c6b85ba85e423db91a9ecd950dba64446db
pdf-font-stream PDF embedded font (sfnt) at offset 0x12CA6 11328 bytes
font_02_sfnt_off0001469c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1469C 16792 bytes