Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c43307b2a73b3c0…

MALICIOUS

PDF

96.2 KB Created: 2021-03-17 05:45:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 5e2fc6e4347a52c10b28fa7343740314 SHA-1: c2ba041cb0efc3d2a01c8e83b0b5998687c82099 SHA-256: 9c43307b2a73b3c0e992410d7ffc6d8c8f1aab2bb94b8e32f5d8b1c8bda463e3
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://ponafet.ru/123?utm_term=chiari+i+malformation+wiki PDF link annotation
    • http://clientbluebadge.com/what_if_new_marvel_movie3ar3r.pdfIn PDF document text
    • http://erogan-oficial.site/70140465138n1y54.pdfIn PDF document text
    • http://biomaniks.website/ishihara_color_vision_test_answersqnbcw.pdfIn PDF document text
    • https://cdn.sqhk.co/bapisolel/igDCgio/cossacks_3_best_nation.pdfIn PDF document text
    • http://chaptejvxz.fun/gamiveluronesuwafivenbv2.pdfIn PDF document text
    • https://cdn.sqhk.co/wetiniwem/ijDQhcd/42878201886.pdfIn PDF document text
    • https://cdn.sqhk.co/mibaforetu/ge5jfhb/home_depot_rental_sheetrock_lift.pdfIn PDF document text
    • http://golulim.iblogger.org/numivatapidikigaroxotalu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sasavinoseg.epizy.com/can_anyone_check_your_credit_report_uk.pdfIn PDF document text
    • https://77ac2d45-d533-4b4b-a85c-01e81860bff9.filesusr.com/ugd/7f1ad7_4976dc460b3d400f9e7ff75ebb2542eb.pdf?index=trueIn PDF document text
    • http://madanekobovuge.epizy.com/kyoto_protocol_report.pdfIn PDF document text
    • https://9e2bb560-353e-4f5d-a08b-1363560edab4.filesusr.com/ugd/6c032c_bdec05f8cf4c43baa8587bb1db588e78.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/09a64c4d-3900-4285-b59c-2a2a44502603/how_to_change_battery_on_liberty_safe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5261e76d-32ea-4342-b743-8081e9f87c4a/what_are_the_causes_of_conflicts_in_africa.pdfIn PDF document text
    • http://ronagipesi.rf.gd/electrical_engineering_cv_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a6344a69-e2aa-4040-ac79-1b1bd16b5f0d/42754821937.pdfIn PDF document text
    • http://pajiridi.rf.gd/muwarasafoma.pdfIn PDF document text
    • https://788ae96d-7a4f-4726-91a9-07bb742fb3e7.filesusr.com/ugd/97aff7_0eed9d5e6b674861bf93b4a5170f5f38.pdf?index=trueIn PDF document text
    • https://30b7a97f-6117-4fff-8876-4b3c2220b6c6.filesusr.com/ugd/15cd4d_370dc17f626540098114b6ddf8f4dce9.pdf?index=trueIn PDF document text
    • http://vulomalizekuvu.rf.gd/www.bpsc.gov.bd_job_circular_2020.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_off000139c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x139C5 4888 bytes
SHA-256: 59f2a69eef7326fe2ac1b5a152602033a5ef41910840e31156db4c48fafe07db
font_01_sfnt_off00014a49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14A49 12016 bytes
SHA-256: ee617876fb5b2e01e0906c258ec7de98ac98128d72623de57592da0e1fc97f4d

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