Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd710dfe1e988763…

MALICIOUS

PDF

71.2 KB Created: 2020-12-10 23:04:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 4caede3bdef39782086575c47749653d SHA-1: 328686e8eedb6143a263577522354d7f03227e9c SHA-256: bd710dfe1e9887633c97ff6a05d469606e2e3e9475237350626c6aa5d5f18aeb
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains a large number of external links, many of which point to PDF files, suggesting a link farm or redirection mechanism. The primary malicious URL identified is 'https://trafffe.ru/strik?utm_term=political+geography+current+events', which is likely used to redirect users to a phishing site or download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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://trafffe.ru/strik?utm_term=political+geography+current+events PDF link annotation
    • https://sufusazowuk.weebly.com/uploads/1/3/4/3/134311692/revitulamito-danagefebugo-xexotewugagox.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366632/normal_5f883975423d3.pdfIn PDF document text
    • https://mogijoduvide.weebly.com/uploads/1/3/0/8/130814471/774977c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/4167ad4e-9ec8-4743-a931-c04dbd668f3c/gang_garrison_2_online.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/480a39f9-3692-464f-8c31-631f81d15622/90846196266.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/16ee392e-0af2-4def-a072-d7c8d322f57a/nivudasiwejum.pdfIn PDF document text
    • https://s3.amazonaws.com/petikamov/american_history_eoc_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/zufojadibi/prokaryotes_and_eukaryotes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f0a7fa2-c2b9-46ac-aa76-cbc2306efe22/15260368035.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9600ac86-bfee-4d72-abca-ce0017a6e4f5/glados_text_to_speech_android.pdfIn PDF document text
    • https://s3.amazonaws.com/pobixedele/13414860706.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/94507321-5ce0-4ea6-a8d0-58450ee377c3/kalujadufe.pdfIn PDF document text
    • https://s3.amazonaws.com/bejideba/79886303174.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ee852af-6bc6-4250-8970-71664ae5883f/delikefolitapalamin.pdfIn PDF document text
    • https://s3.amazonaws.com/purawuma/oxidative_stress_thesis.pdfIn PDF document text
    • https://s3.amazonaws.com/bovenotojitowe/context_clues_examples_in_literature.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cc94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC94 5240 bytes
SHA-256: ede85aa484ac6be008490d597556524a6cbcb6669bc0d3465f844bc7023cf0b2
font_01_sfnt_off0000de61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE61 10424 bytes
SHA-256: e9fffbde0bc3bb23ce7dd18b49680e9d95f6528cb9a123a218ee706f9ab5f5d8
font_02_sfnt_off000101f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101F6 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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