Malicious PDF — malware analysis report

Static analysis result for SHA-256 73fbc5800e7f9627…

MALICIOUS

PDF

159.1 KB Created: 2021-07-15 15:56:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 9a7a69bfa9cf22f06d06b6525ee2b056 SHA-1: df47813dcfdf628944019d2f241698d6f6012f8a SHA-256: 73fbc5800e7f96275016fc412fd3822696b212f74944604c7819233a8dc812b9
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress sites, suggesting a phishing or malicious redirection scheme. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. The document body is unreadable, but the heuristics and URLs confirm a link farm attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9913

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.enterpriselighting.com/wp-content/plugins/super-forms/uploads/php/files/1066d4adcd2e59677bff22f474e885bf/gamazofifutitinofuxifum.pdf In PDF document text
    • http://goldmustang.com/files/files/5947692292.pdfIn PDF document text
    • http://allegroescrow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094a14d1fbd9---14348593865.pdfIn PDF document text
    • http://euro-ex.com/images/blog//file/93470252391.pdfIn PDF document text
    • http://progfin.pl/userfiles/file/99667468946.pdfIn PDF document text
    • http://fw-simple.com/uploads/files/49883149434.pdfIn PDF document text
    • https://argumentua.com/i/file/toziwajelituk.pdfIn PDF document text
    • https://www.uniqueartzz.com/wp-content/plugins/super-forms/uploads/php/files/uonrrq0v0t86i4asv45b1cqc3q/58958983303.pdfIn PDF document text
    • https://citronixdeflection.com/nbloom/fckuploads/file/61619815217.pdfIn PDF document text
    • http://www.kmclogistics.com/wp-content/plugins/super-forms/uploads/php/files/68f4395c153802fe305b7afc89fb05d2/65200278175.pdfIn PDF document text
    • https://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a365370ddab---32061171300.pdfIn PDF document text
    • https://ratsimae.ee/media/contents/file/redevilatej.pdfIn PDF document text
    • http://abpaluso.com/upload/file/tedonenelure.pdfIn PDF document text
    • http://www.yourhealthyourchoice.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c9693dcb45d---31569842163.pdfIn PDF document text
    • http://antwerp-rentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cb6381a2552---niliwinibixuwupomo.pdfIn PDF document text
    • https://morganmethod.com/ci/userfiles/files/mebedijawoneke.pdfIn PDF document text
    • http://agcslohian.com/userfiles/file/muwamerazomex.pdfIn PDF document text
    • http://dagmar-e.de/userfiles/file/wegemotawekimaf.pdfIn PDF document text
    • https://www.proctoloji.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608192309a646---tokokafaxupakoz.pdfIn PDF document text
    • http://dashoernerboot.de/userfiles/dosegid.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c00f4870206---89299734766.pdfIn PDF document text
    • https://collegemahan.ir/basefile/collegemahanir/files/lewelevabif.pdfIn PDF document text
    • http://www.skup.it/wp-content/plugins/formcraft/file-upload/server/content/files/160803734b42fc---wijiwatugafewitewamovego.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=colonising+meaning+in+tamilPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00020aa1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x20AA1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000222b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x222B3 21076 bytes
SHA-256: 7ff6cf22004f51914ba092d102964e06d66ee87c77634f0dcda09455b2264b42
font_02_sfnt_off0002571b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2571B 10380 bytes
SHA-256: f21df907545590566699d63aadbfc95600cd55e6234152700b4a6c1a61a6e0c5

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