Malicious PDF — malware analysis report

Static analysis result for SHA-256 64a6abf66228e370…

MALICIOUS

PDF

96.2 KB Created: 2021-05-08 21:46:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: e12a1f8332193962d6b82c745cd1a6a6 SHA-1: 6d615788f4c8150bf6dcbdd329b8dd393ab77da5 SHA-256: 64a6abf66228e37083b20fa9d3946fbb28bb4b3fb913f6e776d18a6006dae149
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 0.9998

Heuristics 5

  • 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 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://lozipotod.ru/strik?utm_term=reloading+press+mounting+options PDF link annotation
    • http://dumubemajizukov.medianewsonline.com/57347627730.pdfIn PDF document text
    • http://tufinanegonaj.medianewsonline.com/nunariwemavasilemuse.pdfIn PDF document text
    • http://tixokapine.mypressonline.com/coriolis_flow_meter_endress_hauser.pdfIn PDF document text
    • https://tokubarip.weebly.com/uploads/1/3/1/3/131380438/vimamerawarazod.pdfIn PDF document text
    • http://ketoxitigojaluk.sportsontheweb.net/red_cross_first_aid_courses_saskatoon.pdfIn PDF document text
    • http://xulubapatoso.scienceontheweb.net/what_is_the_standard_enthalpy_change_of_combustion_of_al2s3.pdfIn PDF document text
    • https://lisevududotuwak.weebly.com/uploads/1/3/4/2/134265384/lovojewotegujo.pdfIn PDF document text
    • http://bazunujovi.scienceontheweb.net/begomigufotokeramenexan.pdfIn PDF document text
    • http://luloxijemise.medianewsonline.com/carol_of_the_bells_pentatonix_satb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://17500468-634e-4f48-81ad-48a4a068d6fa.filesusr.com/ugd/dcac76_539377a9035a48a6865ed7e94c44a3cf.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/ccfc9ceb-2b1b-4c32-9c63-2abcb37ddfc3/how_to_make_saltwater_bottom_fishing_rigs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb764a47-0234-46cf-90d0-0213465ad88a/how_to_put_vinyl_decal_on_window.pdfIn PDF document text
    • http://dapizodipe.myartsonline.com/how_to_become_a_woman.pdfIn PDF document text
    • http://roveramo.atwebpages.com/hewlett_packard_8600_printer_manual.pdfIn PDF document text
    • https://adc0bc6f-2b4d-4951-bce0-9128d215fa34.filesusr.com/ugd/5ea4d5_b12aebcb7ebf4885adcc56de9fe925fb.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/d43e58ee-09f5-40b9-b24e-5e5f1bdddea9/84873042003.pdfIn PDF document text
    • http://luvetux.myartsonline.com/gumovuwisuzapajesopete.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013a72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A72 5288 bytes
SHA-256: 5a8d4bcbb6dbecb9a84407a4529acaff51895b7758221e2e722b2c97d63151cf
font_01_sfnt_off00014c5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14C5E 11112 bytes
SHA-256: f8560436993464fe7bfeb1cf76b70f90e66a01e0e36599512e1e9a0a7163398f

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