Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d0d2973526794d0…

MALICIOUS

PDF

78.8 KB Created: 2021-05-20 05:28:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b6ca0bf5bb0dc89a7a06efbdd93fb4de SHA-1: 6762697e5bcc0c9711707a8065fb1335536d1147 SHA-256: 2d0d2973526794d04bfcda6a8f90a787a16771f20cc7cacc8c2ebc2d5612ed00
156 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with one prominent URL pointing to a site that appears to be a lure for Minecraft-related content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware delivery. While no scripts were explicitly extracted, the PDF structure and heuristic firings suggest it's designed to redirect users to malicious or deceptive websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://botokaw.ru/strik?utm_term=how+to+add+custom+sounds+into+minecraft
    • https://pagejenaxupiwig.weebly.com/uploads/1/3/4/3/134383440/9830931.pdf
    • https://wimaxexuxiwob.weebly.com/uploads/1/3/0/8/130874544/tegujaxa.pdf
    • https://bopifodefow.weebly.com/uploads/1/3/4/3/134383970/mepela-rovotigurunug-gekowovifatidi.pdf
    • https://dimejozetef.weebly.com/uploads/1/3/1/0/131070151/3298203.pdf
    • https://kexiwiwimibip.weebly.com/uploads/1/3/1/3/131379584/7638640.pdf
    • https://zalirusupu.weebly.com/uploads/1/3/4/5/134516706/vowegilixadilik.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/xeruxaxer/exclamation_sentences_ks1_worksheets.pdf
    • https://s3.amazonaws.com/varolexexus/82866796523.pdf
    • https://s3.amazonaws.com/jutenojamega/esl_find_someone_who_template.pdf
    • https://s3.amazonaws.com/xidazeze/free_joomla_template_gantry_framework.pdf
    • https://s3.amazonaws.com/rodakarugupoko/milk_and_honey_book_target.pdf
    • https://s3.amazonaws.com/wopari/zufiza.pdf
    • https://s3.amazonaws.com/jinabom/32027111971.pdf
    • https://s3.amazonaws.com/nefagolom/cross_platform_games_switch_and_pc.pdf
    • https://s3.amazonaws.com/sojaxub/outlook_calendar_csv_template.pdf
    • https://uploads.strikinglycdn.com/files/727c70e2-5948-47ab-aea5-5b1080df0b94/bleach_cycle_to_clean_washing_machine.pdf
    • https://s3.amazonaws.com/wuwabobujasivor/44465899008.pdf
    • https://uploads.strikinglycdn.com/files/9874656a-d136-4171-9650-16ae3f054268/49180099544.pdf
    • https://s3.amazonaws.com/wogikokuzotaxa/80053876352.pdf
    • https://s3.amazonaws.com/gedimuta/ash_thrombocytopenia_guidelines.pdf
    • https://s3.amazonaws.com/fedufiporara/install_identity_server_4_templates.pdf
    • https://s3.amazonaws.com/kexamoxusinixu/43757230423.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f2db.bin
6648678ab3916d5fa27b9966b29c60956c72764947176060f3e9c35ec27b7fda		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF2DB 5188 bytes
font_01_sfnt_off0001047b.bin
e965e739e5461ca4d3bb4e9e970d37ae04cbe5b4fa28fa4581252e6426892e1c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1047B 11560 bytes

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