Malicious PDF — malware analysis report

Static analysis result for SHA-256 04de195601f3b4c8…

MALICIOUS

PDF

83.8 KB Created: 2021-06-28 02:35:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 9f6ae14f7ed1059baa24c972aa0e47bc SHA-1: f00a4f492454add4c098b2c130422992e001938e SHA-256: 04de195601f3b4c87bc4d8914fca52b0ca7eda51925c6839ea4743044c8204b4
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, indicating a link farm. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. The primary function appears to be redirecting users through a network of sites, potentially for SEO poisoning or to serve malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://topclassgreenery.nl/images/file/14354250784.pdf In PDF document text
    • http://wksystems.net/HotelEstimator/userfiles/file/fuxewijigelenilutipu.pdfIn PDF document text
    • https://nepalimodelagency.com/userfiles/file/38171063503.pdfIn PDF document text
    • http://villaturri.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609e5d065674f---97920584511.pdfIn PDF document text
    • https://www.masismarketing.com/wp-content/plugins/super-forms/uploads/php/files/a12b805b9a8f85e7c48a6ea1a6ae9b11/3965872089.pdfIn PDF document text
    • https://myupfield.link/wp-content/plugins/super-forms/uploads/php/files/m3mhde1nmu0evlqvh44r60q4ko/67736710955.pdfIn PDF document text
    • http://adoriantarla.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607e7c9fdb346---rigarisepawofixamepop.pdfIn PDF document text
    • https://ehblending.com/wp-content/plugins/super-forms/uploads/php/files/580b865b84217cca338f94438179793d/fukuxebabijik.pdfIn PDF document text
    • http://amirafouad.com/uploaded_files/file/zewuwolifitoges.pdfIn PDF document text
    • https://menu2uplus.com/images/file/lufodixefedinavasafeja.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/160a44bbb6caaa---pebofisojeji.pdfIn PDF document text
    • https://chameleoncoupons.com/adgprocessing/uploads/files/fonowadabodi.pdfIn PDF document text
    • https://dtcprojects.com.au/wp-content/plugins/super-forms/uploads/php/files/cvu9mctm5fuc5k4qu1e2q8tu0j/nefajazeludeb.pdfIn PDF document text
    • https://nothingbutsafetyglasses.com/userfiles/file/83516126330.pdfIn PDF document text
    • http://domainecomps.com/documents/files/wefosof.pdfIn PDF document text
    • https://msr-hudsonproperties.com/wp-content/plugins/super-forms/uploads/php/files/c710e80d90ea0e99865d6470ccd0d6b7/tofawulemovilalotoviroza.pdfIn PDF document text
    • https://southernlightingsource.com/wp-content/plugins/super-forms/uploads/php/files/74e5b3073ac081929593eb284819e008/mojelefebojogifofama.pdfIn PDF document text
    • http://4reality.cz/userfiles/files/jexedopodivil.pdfIn PDF document text
    • https://jxloanchien.com/style/postimage/file/fisexoxulaluganazakiri.pdfIn PDF document text
    • https://rkdestate.com/userfiles/file/84964511563.pdfIn PDF document text
    • https://www.anandtirth.com/wp-content/plugins/super-forms/uploads/php/files/ut4b18413n6n54c81a3rt71a64/levevaxix.pdfIn PDF document text
    • http://workprohealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f98c762fa8---sasiperufibag.pdfIn PDF document text
    • http://thesetnews.com/images/fckeditor/file/nolobejoveg.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=pilonidal+cyst+blood+in+stoolPDF 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_off0000e78a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE78A 16588 bytes
SHA-256: 5b6944ef3bd69683e4ee8e81e74f1ea40c5b8c9a1f3012d81ae46a8f7f6f68ce
font_01_sfnt_off00011264.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11264 10388 bytes
SHA-256: 7f258e7fef42ef271e9b273b602861f9257b29b19087c5db504abad94aaca7a1
font_02_sfnt_off00012a08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A08 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.