Malicious PDF — malware analysis report

Static analysis result for SHA-256 69a8d167de1660fd…

MALICIOUS

PDF

75.2 KB Created: 2021-03-23 16:56:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 26c37861404fcace60284703e1b9977a SHA-1: de904152d951b77747c8908942110fdce91b5af2 SHA-256: 69a8d167de1660fd7e9129948aa06466cfa294227de6754d1ddcab24301d97ff
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 0.9999

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://dugedepap.ru/strik?utm_term=behavior+charts+for+elementary+students+pdf PDF link annotation
    • http://itawegan.fun/xigebikubovuwonoe1g4i.pdfIn PDF document text
    • https://cdn.sqhk.co/gituridewo/08hchjj/80108734951.pdfIn PDF document text
    • https://cdn.sqhk.co/vemetafije/azifhfN/photo_collage_maker_download_for_windows_7.pdfIn PDF document text
    • http://pesale.pro/tofuleradapok3d5w.pdfIn PDF document text
    • http://zawazubiwezug.iblogger.org/defavagopomejode.pdfIn PDF document text
    • http://test123test.xyz/hungarian_verb_conjugation_practice3zyih.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380070/normal_5fccaf37817e2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459337/normal_5fd8860757912.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452599/normal_5ffdc01720ad8.pdfIn PDF document text
    • https://cdn.sqhk.co/siduniberame/ihVjgtT/8960756535.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/3952aa14-7731-4f53-ac03-3497ac8278d0/what_is_a_trust_account_in_law_firm.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c3ab0f15-9dd5-4488-80b6-5d36a5afd0ca/amazon_prime_video_cloudy_with_achance_of_meatballs_2.pdfIn PDF document text
    • https://39c3e2ba-dcb8-4bc0-9ed7-0058f02c59d5.filesusr.com/ugd/fd4c29_240d2a9ca89d45b5bc4f8cf2c331a2cd.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/c3a06029-cbb0-482e-82a9-791a77b35043/pakuwexelonejubo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dcbd4e8f-5d6a-4116-9b40-5fd009a6e824/torugetorufosatov.pdfIn PDF document text
    • https://168d2a81-f750-40c6-a653-3787650f980d.filesusr.com/ugd/3bcfef_a1673af9d21440a98f18560f31bc096d.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/bb57267b-1b8b-4df0-b815-7ada40570a50/2290561310.pdfIn PDF document text
    • http://gujilozep.epizy.com/kemapu.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_off0000e96b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE96B 5608 bytes
SHA-256: edba66b96d4210b29c8b07df283f889d82c798d3eea99aa4da48b32999fabb90
font_01_sfnt_off0000fc65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC65 10336 bytes
SHA-256: 61397a810338a25bb0e06048e634c47542f755c9161c7980f584d2daa8d1baf9

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