Malicious PDF — malware analysis report

Static analysis result for SHA-256 bcf2617b205c1119…

MALICIOUS

PDF

81.2 KB Created: 2021-05-06 17:22:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: a2d7a4b14e13f73707fa57b7f491d259 SHA-1: b422c9b8ba0cbfc804838a3f751d70f02f376388 SHA-256: bcf2617b205c111935f43cdeb018b8a52eb0df9e6873e43bbedee78017414488
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 a lure related to a software coupon, directing users to a suspicious URL. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware distribution. The presence of numerous external links suggests a link farm designed to obscure the ultimate destination or spread malicious content.

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://soxebez.ru/strik?utm_term=fl+studio+producer+edition+coupon PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4373779/normal_6046a1806cf54.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389355/normal_60152ac0a73a4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417408/normal_6052b6780024f.pdfIn PDF document text
    • https://latejurudawiron.weebly.com/uploads/1/3/2/7/132740343/1e28d.pdfIn PDF document text
    • https://rewagafiwexufot.weebly.com/uploads/1/3/1/8/131856649/9190478.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491426/normal_5fd8b354c7074.pdfIn PDF document text
    • https://wezobugedelu.weebly.com/uploads/1/3/1/8/131856743/lopolubege.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391893/normal_5ffe9e6352da9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365619/normal_5ffe482bc392d.pdfIn PDF document text
    • https://xovelojedawoka.weebly.com/uploads/1/3/4/6/134662979/7192436.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374699/normal_5fed69f5a74be.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/kalanejaxutilif/47576927705.pdfIn PDF document text
    • https://s3.amazonaws.com/nedijowewoded/nenesosamivotoboko.pdfIn PDF document text
    • https://s3.amazonaws.com/wumodukubaru/apex_launcher_apk_4._4._1.pdfIn PDF document text
    • https://s3.amazonaws.com/mukutud/49892413010.pdfIn PDF document text
    • http://lixoledu.rf.gd/bandhan_bank_loan_form.pdfIn PDF document text
    • https://s3.amazonaws.com/wixanarer/acrobat_dc_2015_update.pdfIn PDF document text
    • http://pozifaganepele.epizy.com/ventajas_del_almacenamiento_en_la_nube.pdfIn PDF document text
    • https://s3.amazonaws.com/fasomusogapovi/introduction_to_java_programming_liang_12th_edition_download.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_off0000feac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEAC 4812 bytes
SHA-256: 4262a2048ed406cc1a4bcebfb1382236ba87560eb9de4227acec16bd1d4ab900
font_01_sfnt_off00010f1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F1E 11416 bytes
SHA-256: d5f4d3020443d0f356574dc843258de8dc651ea3adbc3612bb3e4bef80f2dbd7

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