Malicious PDF — malware analysis report

Static analysis result for SHA-256 436ed540a9d1a372…

MALICIOUS

PDF

69.4 KB Created: 2021-02-21 00:55:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 6ef1affb1a939a964b9684bbddca8e0b SHA-1: 8109b39220b664f194a89cf85f8570499378ff1a SHA-256: 436ed540a9d1a372541070baacf9118eedf172663213913ddf76fd3592c74cea
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are obfuscated or use link farms, indicating a malicious intent to redirect users to potentially harmful sites. ClamAV and ML classifiers confirm this, identifying it as a phishing or trojan PDF. The embedded URLs suggest the document is part of a campaign to drive traffic to malicious content.

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 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.
  • 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://maypoin.ru/strik?utm_term=alex+rider+cast+episode+3 PDF link annotation
    • http://jogubewuzamofet.iblogger.org/gagovifubo.pdfIn PDF document text
    • https://cdn.sqhk.co/wogefosa/egjichh/living_room_sofa_ideas_brown.pdfIn PDF document text
    • https://cdn.sqhk.co/dazibewibu/Vjjjj1M/xozebavamozomakovarig.pdfIn PDF document text
    • https://jadilojapup.weebly.com/uploads/1/3/5/3/135313437/karagonebofaval-jejamas.pdfIn PDF document text
    • https://cdn.sqhk.co/wasusoguba/ihjjdgf/chain_reaction_2_sneakers_blue.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422637/normal_601c6e8e8409c.pdfIn PDF document text
    • https://cdn.sqhk.co/jefapukawore/gxmiegg/nbc_sports_gold_premier_league_commentators.pdfIn PDF document text
    • https://cdn.sqhk.co/gimexigerub/dK0gjHn/mawunoropepena.pdfIn PDF document text
    • http://velixone.66ghz.com/aero_performance_propellers.pdfIn PDF document text
    • https://cdn.sqhk.co/lafuwexale/RQijuIc/13905613734.pdfIn PDF document text
    • https://cdn.sqhk.co/mixasuwekov/hTgfIid/lobizisevuxatutozes.pdfIn PDF document text
    • https://zolotamazuragif.weebly.com/uploads/1/3/2/7/132712333/nirafaja.pdfIn PDF document text
    • https://cdn.sqhk.co/tarudifirew/7EUOohj/wishlist_apparel_reviews.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gagisejokunego.rf.gd/giterori.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_off0000d30b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD30B 5288 bytes
SHA-256: 21c14ffe150a31c615e795bd3d3853f4547f9e905d43bdda5b3c875bb96cde54
font_01_sfnt_off0000e51f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE51F 10532 bytes
SHA-256: 5383a46ea02febb4f9c02f9d17b2d6164029625ab9b03f493d6845f6c296de74

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