Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3e1dc797cda68dc…

MALICIOUS

PDF

66.1 KB Created: 2020-11-18 15:34:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: a167a3a78159f9ab4106c0ef88fc583e SHA-1: d92a7af60107fb1387e384184e9ee9a0f209e3da SHA-256: e3e1dc797cda68dccbbd8e2e4e9781423ecd65364e9466e9d882ad1141150268
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 0.9997

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=bdo+dark+knight+gear+guide+reddit PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4413590/normal_5fa2cf03c1720.pdfIn PDF document text
    • https://tevumusavobe.weebly.com/uploads/1/3/4/1/134108657/fc8d244d8e6.pdfIn PDF document text
    • https://xukukotazu.weebly.com/uploads/1/3/4/6/134654047/gejeduwopasez_nujotof_fozigitomami_fijaxikokeg.pdfIn PDF document text
    • https://lifagixuwemup.weebly.com/uploads/1/3/0/9/130969738/8133835.pdfIn PDF document text
    • https://riwisasivituw.weebly.com/uploads/1/3/1/0/131070703/dcab2e3fd7.pdfIn PDF document text
    • https://vakesefujes.weebly.com/uploads/1/3/0/7/130739027/vedenufu_duxevur_rigulekuwekolo.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/97c14e10-9b8e-495d-9be1-1c0b8e92e1b9/kurezojalemuga.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b48ac67d-6b39-4f60-8e7b-abaa1ad52f21/80247096874.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f515a9e-76df-4cc8-92fb-f82156501a7a/wixiwuvivu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f8028b8-5588-4840-a5ee-e836e7d67b5f/3749537800.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f0746c23-ea7d-4211-ad2d-f94aed578114/ludelekarepenuwidaleg.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_off0000bd55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD55 4992 bytes
SHA-256: 57491ab76b52de9a21ba5741abadd85d4b4d3fcf4b27b0e1a46f14ee775b556d
font_01_sfnt_off0000ce43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE43 1800 bytes
SHA-256: daad3f347a4f42f432ee9983e619a7c063e36761dba5934b469418034847e28e
font_02_sfnt_off0000d6d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6D1 10736 bytes
SHA-256: d97ccb45704a353c9c2e37e0f6178085f81b6211b725fd7d0413803cf8ae53db

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