Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb4d0f727ce61877…

MALICIOUS

PDF

64.2 KB Created: 2020-11-13 16:21:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: b6a0a5a3f0c7470da6d9914cf05f4967 SHA-1: 11c1d63867e1594eb37b90968e3ec49a61cd9c2c SHA-256: bb4d0f727ce61877498290c3be40d11bb99857c3bf0a6a1cd3e4e058337553fb
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-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://traffset.ru/strik?utm_term=ford+fiesta+mk6+workshop+manual+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4379385/normal_5fa039e86cb86.pdfIn PDF document text
    • https://lifagixuwemup.weebly.com/uploads/1/3/0/9/130969738/a4fbcc08c7c6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370764/normal_5fa87fc1b6bfd.pdfIn PDF document text
    • https://takatika.weebly.com/uploads/1/3/4/6/134605824/5e7003263a769fe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386365/normal_5fa6d2b8d266a.pdfIn PDF document text
    • https://bovaromekefa.weebly.com/uploads/1/3/4/4/134403346/8c07cfeca4.pdfIn PDF document text
    • https://sagedawigaput.weebly.com/uploads/1/3/4/3/134336778/fokesi.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/kevava/dodofipamex.pdfIn PDF document text
    • https://s3.amazonaws.com/zeworibuzoza/gear_shift_cover_jeep_wrangler.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2cee1643-a38b-4a1b-92f3-4622a5a13953/sodojufinapuveperoxi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bb92a7ca-46d3-43b7-8cb0-00db8e761f14/97066502024.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0e29aa2a-cae4-4c59-b581-42925bbf0924/rujonikorotobu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a3f1557-2436-425a-9ad2-67e6f2fe83dd/vajitajixiwojikepe.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_off0000bd96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD96 5548 bytes
SHA-256: 61f11b04d1d9819d98935556b5fb4a058af9cebe600052e74c613b78a93cfa38
font_01_sfnt_off0000d064.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD064 10456 bytes
SHA-256: e1b1819e2ebccf76ea5e8dc74ec77558118f362472e10ad552b58474cf0aa934

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