Malicious PDF — malware analysis report

Static analysis result for SHA-256 03b2b81f3965a1f2…

MALICIOUS

PDF

80.7 KB Created: 2021-06-14 21:03:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 77224675798079762b95a18137ba8cb9 SHA-1: 86329ad69b9e240f504598c5cc1743d6be3995d9 SHA-256: 03b2b81f3965a1f28d9fb17fb6298994dd15a04f3fe3c60abd439e72d738fafd
196 Risk Score

Malware Insights

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

This PDF document is classified as malicious by ML and ClamAV, and exhibits characteristics of an advance-fee scam. It contains multiple links to external websites, many of which are hosted on compromised WordPress installations, suggesting a phishing or redirection attempt. The document's content, despite being heavily obfuscated, is identified as a lure for lottery, prize, or parcel delivery scams.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • 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://smidgel.ru/uplcv?utm_term=sonic+mega+collection+gamecube+rom PDF link annotation
    • https://kvartira-zalog.ru/wp-content/plugins/super-forms/uploads/php/files/528b4aa69da207ed43548bcc1f08007f/javeti.pdfIn PDF document text
    • https://www.teppiche-waschen-hamburg.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607295bb8601f---romoxezosokobopoxabetewe.pdfIn PDF document text
    • https://harpethvalleyhealth.com/wp-content/plugins/super-forms/uploads/php/files/8998f2899f9557401fc251ac012481c3/29295424594.pdfIn PDF document text
    • http://www.maderas-navarro.com/ckfinder/userfiles/files/4802425496.pdfIn PDF document text
    • https://www.alongsideasia.com/wp-content/plugins/super-forms/uploads/php/files/9e1df3ced14dc14f2919233320222bd7/19916599818.pdfIn PDF document text
    • https://taichielite.com/louis/taichi/ckfinder/userfiles/files/43949421994.pdfIn PDF document text
    • http://dodici12.ru/wp-content/plugins/super-forms/uploads/php/files/r469fles9m3rvaen8cikm84p63/38122501859.pdfIn PDF document text
    • http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/2mfe19o3shpi5bb14c3t5vfao8/11286149953.pdfIn PDF document text
    • http://beijinghuojia.cn/userfiles/file/74039608800.pdfIn PDF document text
    • http://capital96.com/userfiles/file/71803538718.pdfIn PDF document text
    • http://www.191seo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071342f1687a---47123516514.pdfIn PDF document text
    • http://urbanconstructions.org/images/uploadedimages/file/39879655928.pdfIn PDF document text
    • https://www.projectorrentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b75e32608ec---winapapu.pdfIn PDF document text
    • https://accesoriosalmayor.com/images/userfiles/file/januxivigo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA3D 5740 bytes
SHA-256: 1bfa61ad73555654600bcc148c7e18e5b2ce3472fa3525be1590419ce53e062a
font_01_sfnt_off0000fe05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE05 5184 bytes
SHA-256: d80a5128f0eb699d13fae42d486b060d4dbb71a10f4ebdc2ace87d170fa53b0b
font_02_sfnt_off00010f92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F92 11132 bytes
SHA-256: 59859e0ef271904504f2c31faed640f63f3835da1eebb4ceb0e967422557f477