Malicious PDF — malware analysis report

Static analysis result for SHA-256 86c754817926edd0…

MALICIOUS

PDF

82.7 KB Created: 2021-03-14 12:47:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 3be5d4c5c5bd5b8a56a7b9cde7de5509 SHA-1: 6ecbb29d07d034d7dbaddd9bd507e144f7279e4f SHA-256: 86c754817926edd0e42d10f7bb6e34e7a33e3e67e0c1b31133f5feefe456b873
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, identified as a link farm, with several pointing to disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were directly extracted, the PDF structure and embedded links suggest it's designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://gimoguvi.ru/123?utm_term=blaupunkt+dms+car+radio+manual PDF link annotation
    • http://leree4.club/messenger_text_and_video_chat_for_free_androidrvs5a.pdfIn PDF document text
    • https://cdn.sqhk.co/pajijolabalu/LhdiSOJ/46470693138.pdfIn PDF document text
    • http://mizebojusur.mypressonline.com/how_to_practice_with_a_samurai_sword.pdfIn PDF document text
    • http://mukinokelek.mygamesonline.org/financial_risk_management_journal.pdfIn PDF document text
    • http://dimax-matrasy.ru/6882692164436jy9.pdfIn PDF document text
    • https://cdn.sqhk.co/bureruverog/gMyjhiu/five_ten_guide_tennie_women_s_review.pdfIn PDF document text
    • https://nudegono.weebly.com/uploads/1/3/4/6/134682657/korigiro.pdfIn PDF document text
    • http://kernig.pro/beautiful_disaster_lyrics_jonhenpj.pdfIn PDF document text
    • http://xariketixagat.mypressonline.com/32335106690.pdfIn PDF document text
    • http://hookup671.site/nolojaxebidedifono50ds.pdfIn PDF document text
    • https://volinamonapefez.weebly.com/uploads/1/3/4/4/134494747/nowusuzebaf-zukimiferorow.pdfIn PDF document text
    • https://cdn.sqhk.co/vesagivara/hbhigjR/video_lyrics_maker.pdfIn PDF document text
    • http://wisatemubudu.medianewsonline.com/71545286421.pdfIn PDF document text
    • https://cdn.sqhk.co/wejafivelij/fVSU8SN/sharpening_stone_kitchen_knife.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://9169454a-6e45-4b39-89c4-5cd9bf0a6084.filesusr.com/ugd/32fbc8_9b4dc66734004ccc946a583c95bead52.pdf?index=trueIn PDF document text
    • https://da550aaf-34ae-4f9b-ad82-7836b82beebe.filesusr.com/ugd/a203e6_abbf8883d72c46ed86e5fa833328d2ee.pdf?index=trueIn PDF document text
    • https://f9c380c0-3c9a-404e-8c76-a924832b335c.filesusr.com/ugd/9c8fb9_f15f27811804487cbc4202292addd82a.pdf?index=trueIn PDF document text
    • https://de315c38-daa2-4293-b666-e554ba9b7d65.filesusr.com/ugd/564d2e_eeec9eb6ddd34a29820ced7f1167ad44.pdf?index=trueIn PDF document text
    • http://widepidaba.atwebpages.com/31904556817.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010689.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10689 5332 bytes
SHA-256: 500297feedc62dc2bd060708db2f1ca6a5431b6daa67fef6ed50d5a329d69c58
font_01_sfnt_off00011893.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11893 10680 bytes
SHA-256: 86dcc68c396be81532cf5c782b6e04d723976b29f9e3a9fe7c2d57cb0e8e201b

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