Malicious PDF — malware analysis report

Static analysis result for SHA-256 79b76fef2385dc01…

MALICIOUS

PDF

71.5 KB Created: 2021-01-08 13:55:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 954b8c2f1a98ca30e5e1a621dd3fc424 SHA-1: 76e2d764570447967a6675f9640a6dd0142dc9c0 SHA-256: 79b76fef2385dc0126a8ba21f835f14fc1439806aeaf7536bc8af08640bd82db
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI pointing to a suspicious domain, which is likely part of a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, suggests a lure related to popular music, likely to trick users into visiting the malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://traffnew.ru/aws?utm_term=top+50+pop+songs+2018 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4403804/normal_5fad8d1870765.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367944/normal_5fd91ae3f3b61.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422144/normal_5ff04c9c7edff.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388608/normal_5f918e29ee04e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367925/normal_5f88a25a55cb1.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/1e8e2356-b684-4e24-bcb2-db0626ca1f40/kuzotodu.pdfIn PDF document text
    • https://s3.amazonaws.com/penefelomiju/27576619899.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/042cdfc8-63fa-4db1-858c-efb4cc2797cd/williams_wall_heater_installation_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/jivamubug/govewogizanez.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/afbf1a3a-04ce-4689-b74d-240bb50bf981/vurifu.pdfIn PDF document text
    • https://s3.amazonaws.com/baxunaf/rujexovavagopuzixupitote.pdfIn PDF document text
    • https://s3.amazonaws.com/sojebelevenex/worupurizoxoxetigux.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e2b9674c-bf37-4278-9f23-91804643507a/66285654196.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_off0000d786.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD786 5244 bytes
SHA-256: 47ee56ac0b5ec023080cbde168c1d08468b5be70134241017283b3bf48c5d33b
font_01_sfnt_off0000e987.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE987 12820 bytes
SHA-256: c0d27b883a78230f61d7b5c28ebdd535367066f3f206cb98a874abaa4d424b7d

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