Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d38784a920e7cb4…

MALICIOUS

PDF

85.4 KB Created: 2021-07-16 08:24:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 43c19a20deef5190fcd29e3f9107e4a8 SHA-1: 5c2fad79485aefa74f8507b80358339e2aa3ffa5 SHA-256: 0d38784a920e7cb4842ad1529322b7d4cd22ccf31ea0dbacf8ec4d53d3eda478
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The numerous embedded URLs point to a link farm hosted on compromised WordPress sites and other disposable domains, suggesting a phishing or malware distribution campaign. No scripts were extracted, but the structure indicates a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://philabc.ru/uplcv?utm_term=bow+wow+and+snoop+dogg+related
    • https://www.plsok.com/wp-content/plugins/super-forms/uploads/php/files/ea199b191af8288eef7292c32830ed47/11294358490.pdf
    • https://biogenetixpharma.com/ci/userfiles/files/6954746631.pdf
    • http://perles-del-beya.com/userfiles/file/50223689821.pdf
    • https://photographerin.agency/wp-content/plugins/super-forms/uploads/php/files/nqh65o6koce15ikmiefjb1v285/60428157247.pdf
    • http://krikrik.ru/uploads/ckfinder/files/mexuni.pdf
    • https://sunsoftinfoway.net/ckfinder/userfiles/files/3292392280.pdf
    • http://webhenevents.com/clients/868374/File/53461431180.pdf
    • https://patriot.ch/wp-content/plugins/super-forms/uploads/php/files/nsn5kc67j1pjfd73581joo6t8a/tobolabuxinifezasex.pdf
    • http://cbelmira.com/wp-content/plugins/super-forms/uploads/php/files/ghq2vep74i7vtsr8368gltp3i0/goxosixozidadalesasi.pdf
    • http://www.pointcookelectrician.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160984479f18ef---juvurilekudugifunukulod.pdf
    • http://becro-plast.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1607bf9f9c2eea---43141334780.pdf
    • http://10glazsikeyrosa.ru/file/norirosu.pdf
    • http://live-lessons.net/lcj/web/uploads/assets/file/wupavukaletotezanube.pdf
    • https://www.treehousecare.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607a8a143b239---lojarezitigir.pdf
    • https://www.icslights.com/wp-content/plugins/super-forms/uploads/php/files/f57ccf4d21ddf730b3692c0e00b632b4/21076356919.pdf
    • https://www.reliancecareuk.com/wp-content/plugins/super-forms/uploads/php/files/f705dd900ce824ae8c89677d0f4181a0/xadilimogisikeweviwa.pdf
    • http://allaboutdowney.com/userimages/53366453161.pdf
    • http://rollfactorytogo.com/uploads/files/wowalawa.pdf
    • http://kartinatv.org/uploads/files/86051867955.pdf
    • http://staging.impactredevelopment.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084e0d89fddd---72567214084.pdf
    • https://www.sevgiliyevideo.net/wp-content/plugins/formcraft/file-upload/server/content/files/16093af0124203---nepilekojupe.pdf
    • https://centrobrands.com/wp-content/plugins/super-forms/uploads/php/files/02e24d5fa641eb86191c6da7f936d1a4/24216408325.pdf
    • http://finsura-lifedirect.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160d861282ad30---49618449106.pdf
    • https://fiambreszav.com/wp-content/plugins/super-forms/uploads/php/files/622364afffdbb925225ca9f74dc0e99a/58828280538.pdf
    • 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_off0000e902.bin
116267f4cd910b2df7221dc47eebcf49e10e78ef44fb388722581a59ff7851ca
pdf-font-stream PDF embedded font (sfnt) at offset 0xE902 10612 bytes
font_01_sfnt_off00010147.bin
46001689170aeb6e3997b98648c530ee3207875aafcfb8a55c4cf88d5b04bb3a
pdf-font-stream PDF embedded font (sfnt) at offset 0x10147 17852 bytes
font_02_sfnt_off00013050.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13050 16792 bytes