Malicious PDF — malware analysis report

Static analysis result for SHA-256 49b27e2988aef084…

MALICIOUS

PDF

78.0 KB Created: 2021-06-02 12:49:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 69de34cdbff5ff4d248c47f96ab569be SHA-1: c792b5ebe00be79c26788d2986652f1783a3efea SHA-256: 49b27e2988aef0847a7c8315f64416036dfe9effee6a22a16744838aa09f40d1
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV. It contains numerous external URIs, indicating it functions as a link farm. The primary URL, https://crewmak.ru/pbw?utm_term=lunchtime+today+results+2020, is likely used to redirect users to malicious content or phishing pages. No scripts were extracted, but the PDF structure and numerous links suggest a phishing or malware distribution attempt.

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://crewmak.ru/pbw?utm_term=lunchtime+today+results+2020 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4412173/normal_602afa2c691a9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464082/normal_5fd06cd76d460.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420031/normal_6030633cba9f5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385435/normal_5fcbb66cd7e60.pdfIn PDF document text
    • https://wipomozexabezi.weebly.com/uploads/1/3/0/7/130776841/7302414.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381344/normal_6032f5be5fd10.pdfIn PDF document text
    • https://gebigimudixerez.weebly.com/uploads/1/3/4/3/134374499/rerije.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375521/normal_605b32f0c0f7a.pdfIn PDF document text
    • https://mivixotagu.weebly.com/uploads/1/3/1/3/131384173/sejenirubal.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405674/normal_6002f26f2967d.pdfIn PDF document text
    • https://berizekaxijaj.weebly.com/uploads/1/3/4/5/134501449/wulevetupe.pdfIn PDF document text
    • https://dugigezulafi.weebly.com/uploads/1/3/4/8/134898894/fedono.pdfIn PDF document text
    • https://vanazufir.weebly.com/uploads/1/3/2/7/132740694/a75369acd0f1d.pdfIn PDF document text
    • https://lufosafol.weebly.com/uploads/1/3/0/7/130775677/7787615.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4393186/normal_60b0e53ddc6f4.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4365657/normal_60b74e91ebb06.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wuxikadafi.pbworks.com/w/file/fetch/144418953/44111995979.pdfIn PDF document text
    • http://visetululiv.pbworks.com/f/sinivevowarapanenebo.pdfIn PDF document text
    • http://dipoziw.pbworks.com/f/yeni_balayanlar_iin_kolay_karakalem_almalar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/37b9728a-703f-4c4e-8bd0-fa5b2bb55a8e/sikudamarafaz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c614f65-be96-4eac-bc6a-3fbc03025809/11368032389.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_off0000f200.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF200 5496 bytes
SHA-256: 03d86b6c6b4201cb85119727abc6fb4f2006d193c30503593fbd0d31b82af938
font_01_sfnt_off0001048a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1048A 11180 bytes
SHA-256: 9b87f28533db9ffce11ce1348671ff7b409bbb6a3fcfbc938ea5ceca9e8edfe7

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