Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6b7e8eec2c93f30…

MALICIOUS

PDF

86.3 KB Created: 2021-01-06 04:24:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 7f7af87261c91d28bdd740c54ea1d5b2 SHA-1: 9942cd06d5a84649f12109d50de723fc15615b07 SHA-256: c6b7e8eec2c93f30188f0aa51efcd320cbbf77ca87a117ed0ba994a02649596d
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 by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan' and an ML classifier indicating high maliciousness. It contains a large number of external links, suggesting a link farm or phishing attempt. While no scripts were explicitly extracted, the PDF structure and numerous external URLs point towards a malicious intent to redirect users to potentially harmful sites.

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://traffking.ru/aws?utm_term=display+7+segmentos+doble+anodo+comun+datasheet PDF link annotation
    • https://cdn.sqhk.co/raxoxawupej/aieSjgp/moranomupumajer.pdfIn PDF document text
    • https://cdn.sqhk.co/ledumixifer/hbqKifm/87428035453.pdfIn PDF document text
    • https://cdn.sqhk.co/tajiwikiter/ehdjahh/56649686139.pdfIn PDF document text
    • https://cdn.sqhk.co/pegebatanuz/gfIFwgd/amigo_pancho_2_level_54.pdfIn PDF document text
    • https://garururukipu.weebly.com/uploads/1/3/4/2/134235121/3388327.pdfIn PDF document text
    • https://bepikirutufuw.weebly.com/uploads/1/3/4/8/134866592/430b19a9b7.pdfIn PDF document text
    • https://cdn.sqhk.co/jipobuxaza/gdijgih/nibuxavolekaj.pdfIn PDF document text
    • https://cdn.sqhk.co/remowiwa/jiijhhR/movie_box_pro_ios_12._4.pdfIn PDF document text
    • https://cdn.sqhk.co/jirowolad/agezfKE/paxatujibofulof.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tumasun/vmware_free_version.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf8f93e3-16eb-4ba2-a97d-c7479c27281d/22090459157.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa61e8e3-c123-4e1b-bdde-917247af9108/tabun.pdfIn PDF document text
    • https://s3.amazonaws.com/sulasatevirexo/puripizilofu.pdfIn PDF document text
    • https://s3.amazonaws.com/kigavanus/best_damn_edc_utility_knife.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/844b5024-0209-4da0-966c-dd22d0759168/how_to_get_free_diamonds_on_choices_without_verification.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/87dd1859-abca-440d-b0ff-279543fa1c14/vofedi.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_off00011163.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11163 5712 bytes
SHA-256: 3ca27a6b610ae31541529ca6b97316c15fa31552caed84d63403d64956341533
font_01_sfnt_off000124c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124C0 11352 bytes
SHA-256: 312e8a55babee97759d928971a1ec519fc9236cd8783e38159db237506ed6f27

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