Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d517e6b6b032c8b…

MALICIOUS

PDF

87.1 KB Created: 2021-09-19 05:05:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: f0abc84f14f96b4f20c10ebcf2184133 SHA-1: afbcb61b4f8b6828f41f26c9b66351611794d355 SHA-256: 7d517e6b6b032c8b125d05db30e016f703c06a751f1e8c9b4c1613fbfc7ff751
156 Risk Score

Malware Insights

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

The PDF file contains a link farm pointing to numerous domains, many of which are hosted on disposable infrastructure or compromised CMS uploads, indicating a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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 http://sinosteelcode.com/filespath/files/20210919100235.pdf In PDF document text
    • http://mobilahomedesign.com/userfiles/files/sifoviteluzowoz.pdfIn PDF document text
    • http://ticaproduce.com/ckfinder/userfiles/files/femitanozozaveme.pdfIn PDF document text
    • http://cheniou.handysociality.com/upload/files/vujisoku.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/28b6ab6c18d4e1cbc91e34b3d2eb91ef/mopazeripiruwabewot.pdfIn PDF document text
    • http://cpviettin.com/upload/files/79996448325.pdfIn PDF document text
    • http://vakantie-noordlimburg.nl/ckfinder/userfiles/files/zusizekuxim.pdfIn PDF document text
    • https://preciseenergygroup.com/media/48524894300.pdfIn PDF document text
    • https://bestmiamiturf.com/wp-content/plugins/super-forms/uploads/php/files/2035a7ae103f0282c6d6ad1a1561f975/mudozozibaxozofuxado.pdfIn PDF document text
    • https://12shio4.com/contents/files/58802126396.pdfIn PDF document text
    • https://www.formwork.co.uk/wp-content/plugins/super-forms/uploads/php/files/970vrppkqelsk0r8knn8e3g6es/82522794850.pdfIn PDF document text
    • http://nieruchomosciklodzko.pl/files/file/lovevigojafovepezadojebad.pdfIn PDF document text
    • https://alubiasdetolosa.com/files/galeria/files/44566885920.pdfIn PDF document text
    • https://izr.fr/files/jemitemej.pdfIn PDF document text
    • https://chogmai.org/ckfinder/userfiles/files/bosonogevajat.pdfIn PDF document text
    • https://alarrabnews.com/images/content/content/file/zotopufiritudusegunorilu.pdfIn PDF document text
    • http://cissud.com/uploads/ck_editor/files/fosokoseripuxukenawepar.pdfIn PDF document text
    • http://kbinteriery.cz/userfiles/file/22153008574.pdfIn PDF document text
    • http://9y.bfage.com/upload/files/20210910143350.pdfIn PDF document text
    • https://smarttactic.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16145594ce1108---zumibijorefit.pdfIn PDF document text
    • https://anjingliar2.com/contents/files/78977978093.pdfIn PDF document text
    • http://kabaretyimpresariat.pl/Upload/file/23060557029.pdfIn PDF document text
    • http://sweepinstyle.com/userfiles/file/73088643633.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=best+android+phone+music+playerPDF 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_off0000eeaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEAF 17828 bytes
SHA-256: 2cc497502ee2bee5f189898c88499c85f833b0b9169c046f7320ffcbb5b77c21
font_01_sfnt_off00011d23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D23 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001353a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1353A 11044 bytes
SHA-256: 1fc47a23d6b8462fd50d7bbd7943fde23ddf358a6fda6bf824e4fc0ea592cfd3