Malicious PDF — malware analysis report

Static analysis result for SHA-256 08e6567da9344529…

MALICIOUS

PDF

72.3 KB Created: 2020-11-10 18:56:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 4132cec3038347c0a296dbc791648ec8 SHA-1: 9f0034758e6185b86079d4c1b67de949fbe59a96 SHA-256: 08e6567da9344529d7b790789d2d5c14c42c9bcf299b75ec4337b78591b6bcca
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous external links, including one to 'trafffe.ru', suggesting a link farm or phishing attempt. ClamAV detection as 'Pdf.Phishing.Trojan' and ML classification further indicate malicious intent. The document body, though heavily obfuscated, appears to reference a service manual, a common lure for phishing attacks.

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://trafffe.ru/123?keyword=lg+electric+dryer+service+manual PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4383800/normal_5f9e0d07204c8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379380/normal_5f8c8f28bfc96.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/zujobis-bogutuxufat-zepajawo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476601/normal_5fa7d97abd2a9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375075/normal_5f91b9b6a5797.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366350/normal_5f8988e8dad05.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404969/normal_5fa10c3757a26.pdfIn PDF document text
    • https://nezozavigarej.weebly.com/uploads/1/3/4/7/134727028/7723144.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370996/normal_5f888ab7e6f7a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389568/normal_5f8eea1cafbc8.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/e7770436-da6b-48b8-a7eb-7f4147e65580/chuubos_marvelous_wish-granting_engine_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0ab8af51-7a5a-4344-a49d-74fe62d953ef/didikulowozifam.pdfIn PDF document text
    • https://s3.amazonaws.com/jamokaroxoj/metode_riset_akuntansi_keperilakuan.pdfIn PDF document text
    • https://s3.amazonaws.com/levumoduf/nevada_high_school_nevada_mo.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_off0000ddba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDBA 5364 bytes
SHA-256: b5dd7414e1f3c7cf31d3ce81f3d8e6c0574d54e7a8d7c03a21c2abc8ad4d1159
font_01_sfnt_off0000eff4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFF4 10652 bytes
SHA-256: fb7c089dc6d7d119d3206ed5a01efce319faa0b3292f2ea8be03aca699392d9d

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