Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d477e92181372e9…

MALICIOUS

PDF

67.1 KB Created: 2020-11-13 15:41:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 64bcbd9cd9b4f6d5205e0e31ce36e35e SHA-1: d5f9afb2a563122d5ed818761b836cc97cd5690b SHA-256: 1d477e92181372e948302693fccdbac96b0fe228398813f02acb47b99b92dea3
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with a critical heuristic identifying a link farm. One prominent external URI points to 'https://trafficel.ru/aws?utm_term=arma+3+dayzero+guide', suggesting a phishing or spam lure. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution.

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://trafficel.ru/aws?utm_term=arma+3+dayzero+guide PDF link annotation
    • https://detasove.weebly.com/uploads/1/3/4/5/134594091/7276102.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455374/normal_5fad5e246c7a0.pdfIn PDF document text
    • https://zekenegelu.weebly.com/uploads/1/3/4/3/134390475/4dc63c42d70a8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464724/normal_5fade7439c0f2.pdfIn PDF document text
    • https://parukiwodisurup.weebly.com/uploads/1/3/4/4/134455528/9975003.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/levumoduf/nuvinujexetikixaj.pdfIn PDF document text
    • https://s3.amazonaws.com/kagedatabujo/ap_spanish_language_and_culture_email.pdfIn PDF document text
    • https://s3.amazonaws.com/lefemijip/psx2_emulator_for_pc.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5b0eaa69-36c5-4455-a95a-7139ddd3d3bc/taxiponamupimifaba.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d65b116-cbff-4871-a3ed-175184a78b33/bogovobupefosube.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/71d958ff-3ada-4aa1-8c0f-efb4dfd03169/63694113125.pdfIn PDF document text
    • https://s3.amazonaws.com/tapexiw/27189502574.pdfIn PDF document text
    • https://s3.amazonaws.com/jenisozazewubo/fastest_pinewood_derby_car_templates_free.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_off0000c8a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8A0 5240 bytes
SHA-256: ea809877d92750afa2e1047010fed890148b8606ad4d3802628ab31e52d11d7d
font_01_sfnt_off0000da6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA6D 11016 bytes
SHA-256: c42892da9d60d72789c340a4e91d7c8bb818a3b91c50f130606f1cfc81a23322

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