Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ce7266a25ed8e29…

MALICIOUS

PDF

74.9 KB Created: 2021-01-07 02:42:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: bd04891eabd4bdbe9a23077dbf5fc76e SHA-1: 96f56b7c0361fedc3abcd0ae8c025bf45b47d2f7 SHA-256: 4ce7266a25ed8e2985626e694c49645da2f759c6615e78ab291ece76a0c22298
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting it's part of a link farm designed to drive traffic to other sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or scamming. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the heuristics point towards an attempt to redirect users to potentially malicious content.

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://trafftec.ru/123?utm_term=mod+para+minecraft+1.7+10+furniture PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4408997/normal_5f997bf11959d.pdfIn PDF document text
    • https://lawawumusew.weebly.com/uploads/1/3/4/7/134765042/5560930.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388285/normal_5fbb6b7943076.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377674/normal_5f92aa5dd0c5f.pdfIn PDF document text
    • https://wekubuzebebam.weebly.com/uploads/1/3/0/7/130739705/38166.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415068/normal_5fb2600342016.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476751/normal_5fadf1e8bfcdb.pdfIn PDF document text
    • https://bixowupe.weebly.com/uploads/1/3/1/4/131409305/mupomizagejefe.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/batiku/new_latest_bollywood_movies_trailer.pdfIn PDF document text
    • https://s3.amazonaws.com/jiwotarotavuz/human_development_report_2016_statistical_annex.pdfIn PDF document text
    • https://s3.amazonaws.com/gulapore/nexaxubipowemere.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/64ba999b-59f5-4d65-8904-d90aa80a11e7/minecraft_villager_mod_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/728b52e3-deba-46ff-bbbd-0eae5173ae5d/91966881929.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d0b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0B9 5400 bytes
SHA-256: 95a7b36b09bcead443b28e5800d8424b22b329913e9b4b8af11db5e05cec5d42
font_01_sfnt_off0000e326.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE326 10616 bytes
SHA-256: 7f9a4842a8b5754a526512b4b79fc764fb6c231d90e0b17f998cefa5e6fdea79
font_02_sfnt_off000107c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107C2 16064 bytes
SHA-256: 9b78b915eb75ef0aea6965a6113565ca1bcac7735c766488ce9f12ff332a71b4

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