Malicious PDF — malware analysis report

Static analysis result for SHA-256 6fc57e6dd18f80ce…

MALICIOUS

PDF

70.2 KB Created: 2020-11-17 20:47:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: a05ef63f10f20e5f1fd713b71c96d093 SHA-1: 2697a9d4322a65e3d202ed4b8146006e8fbf7fd8 SHA-256: 6fc57e6dd18f80ce84950f14c825d6ddb2788d6233698d336acb6faee564d97d
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://traffking.ru/strik?utm_term=spot+the+difference+printable+black+and+white PDF link annotation
    • https://suliwire.weebly.com/uploads/1/3/4/6/134650608/6805160.pdfIn PDF document text
    • https://vigaziwow.weebly.com/uploads/1/3/4/3/134322068/wuzepibafux-sofasopavepam.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370077/normal_5fa96e693f251.pdfIn PDF document text
    • https://kamijiruwidezi.weebly.com/uploads/1/3/4/3/134387945/6528c6d45b0.pdfIn PDF document text
    • https://xalipifizipig.weebly.com/uploads/1/3/1/3/131379045/nododexikaneno.pdfIn PDF document text
    • https://paxesejok.weebly.com/uploads/1/3/4/3/134348383/jebatimoseraz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485572/normal_5fabc64907ae1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/70236c00-b586-4ac0-adb5-d55faa867730/jexonaminovexomikav.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/371c6011-8d03-4ae3-ac89-ba1a9ba45e1d/50286212665.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/353ed91a-dd42-4330-aa35-4d90c90f7287/juwelaxobu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e536118a-e66a-4c6b-b651-a1d3d22d8ab5/72569961886.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/19db1088-65c5-4678-9441-dd0b83beac73/11474215149.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/af0e234d-fa1c-4636-9b85-cf5306d63aa1/dalozavasobivav.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9828968e-eb31-468a-abbd-68e36514198a/38299143201.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b87cfeb-f020-44fb-9dfe-8dc272d2f785/tonowozeb.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_off0000d5c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5C1 5464 bytes
SHA-256: ec805572d819cfb53cc2abf7ca739d96282747e95c19f156b4cf41ed046e0d18
font_01_sfnt_off0000e864.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE864 10400 bytes
SHA-256: 15e44f5dcfa4e15bace04a42a6c2d5a55f2811e1936e3a800a1617de7b9a9844

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