Malicious PDF — malware analysis report

Static analysis result for SHA-256 98e04dccfeecb90a…

MALICIOUS

PDF

91.2 KB Created: 2021-03-23 01:22:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 386007979138dfa458d6f1d7c3036cbf SHA-1: 8e05cc20f05e61ae177c0e8b4e0082f7a919b030 SHA-256: 98e04dccfeecb90af2add2ade114a42d148d14ffd71da303706c5c08fe1954fa
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://dafemum.ru/aws?utm_term=bissell+crosswave+pet+pro+black+friday+sale PDF link annotation
    • https://wikefazopikevi.weebly.com/uploads/1/3/4/7/134715570/5441124.pdfIn PDF document text
    • https://mivodijabid.weebly.com/uploads/1/3/4/7/134732330/adb56a0a68.pdfIn PDF document text
    • https://nomozusosowewox.weebly.com/uploads/1/3/1/4/131453154/4e4c92fac7952.pdfIn PDF document text
    • https://cdn.sqhk.co/xilasexiki/huyra9q/movistar_panama_roaming_colombia.pdfIn PDF document text
    • https://lanoxujuzon.weebly.com/uploads/1/3/4/6/134630121/zekevi_xaman.pdfIn PDF document text
    • https://cdn.sqhk.co/ributexovek/gjrjdjj/fepawijaxixuli.pdfIn PDF document text
    • https://kunatelifarak.weebly.com/uploads/1/3/2/7/132712072/9cf3a6817cefe6.pdfIn PDF document text
    • https://cdn.sqhk.co/bimolixumotu/e3ggxxV/juvaw.pdfIn PDF document text
    • https://cdn.sqhk.co/tunixomaj/jhiVsgh/anger_of_stick_5_zombie_hack.pdfIn PDF document text
    • http://gawaxoxirerefi.22web.org/biochemistry_and_clinical_pathology_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/disovaje/icjdtha/kamiko_switch_guide.pdfIn PDF document text
    • https://cdn.sqhk.co/jifibipex/jghF8Eo/coupons_com_earn_cash_back_after_purchase.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/ce85dd5a-9aaf-43bb-8cd8-a56c8d3233ae/tezojedunujuwovivis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7c2bce9-4e7f-42e5-a900-55d002c71c49/confidence_fitness_treadmill_assembly.pdfIn PDF document text
    • http://juvevojoke.epizy.com/antidepressant_drugs.pdfIn 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_off00011673.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11673 5340 bytes
SHA-256: fe4d851b5f43c1c35f2dd170e256a13f0bf03af3f1dfa3586988fc8656e1b3be
font_01_sfnt_off000128c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128C3 11992 bytes
SHA-256: ffe97489be49832453fc168fa32195a87bb7a19abb52b1bc5df41b36ed097902
font_02_sfnt_off00015181.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15181 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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