Malicious PDF — malware analysis report

Static analysis result for SHA-256 65c443eec3f08f80…

MALICIOUS

PDF

62.2 KB Created: 2020-12-10 18:00:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 0fac560b25a96414163f8a810cfe03a3 SHA-1: 1cc5f4203cb570ae5c34b79f07bd91dd2e27fee0 SHA-256: 65c443eec3f08f802963b1b2aa5f8348fd1dec730224c0e406712a0177679ce5
156 Risk Score

Malware Insights

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

The PDF file contains heuristics indicating it is a malicious phishing or link farm document. It embeds a URL that appears to be a lure, disguised as a manual for a Homelite chainsaw. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to redirect users to a malicious site for further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://traffnew.ru/123?utm_term=homelite+bandit+sx+135+manual PDF link annotation
    • https://zagarete.weebly.com/uploads/1/3/4/6/134687236/gekotepojawu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413109/normal_5fb29fd04e79a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc67285d26ff1194f9a01e4/t/5fcaab6a0d05e301b00e7852/1607117676037/kuluxekagasovogewed.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0e2ed17e7202640ea1bf0/t/5fc2c83c2dd96f59184a1884/1606600768729/pukipusoxijekugube.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc587ece2fce462bcab511b/t/5fcc1af32fa8bc6bcdd81593/1607211763417/wawutuvebotas.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc27d7511f6a419848fbf13/t/5fcc10e55177ea328cafc749/1607209190109/cartoon_network_games_app_iphone.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d369df35-12a1-41a7-a338-5bb7cca8119a/25814977490.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc33129affbf90a66f953cc/t/5fc7d6da4bde7d3c2ce25374/1606932188269/majepunubiz.pdfIn PDF document text
    • https://s3.amazonaws.com/peveziwoguxuzam/bucket_filler_song_youtube.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b602f50-1b92-46c5-bf9d-9366871325a3/jonofuletavovopixisuba.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa47c74e-3549-4062-8fbc-805e4acf9a9a/62981085596.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc3bf9f2e34347c70560205/t/5fc559983c02f22b9dbeaa8a/1606769049010/mobamagawubasuxavu.pdfIn PDF document text
    • https://s3.amazonaws.com/vapelurowar/56541582024.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_off0000b425.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB425 5384 bytes
SHA-256: bf2a0f9b8490ff6c967004bccd0ff56a513f0a143685892afd1f3198e26f4fc7
font_01_sfnt_off0000c664.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC664 11388 bytes
SHA-256: de6416d3a91751c120e0394b194ab43c6de1897dff420de2fdd4e013a635b9cd

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