Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc321b2e8fd12890…

MALICIOUS

PDF

82.0 KB Created: 2021-04-10 17:20:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e61de97f234565a2c953de036d669650 SHA-1: 2d950b91dbe60d13c6d0b4584c657bf25a5b406a SHA-256: cc321b2e8fd12890542aa76a3efc080c80711dc3139f431620f43327736b5b8c
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, which is likely part of a phishing or malware distribution scheme. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to redirect the user to a malicious site, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://pelibifir.ru/strik?utm_term=what+is+relational+aggression
    • http://familyit.info/nabev7ivz7.pdf
    • https://static.s123-cdn-static.com/uploads/4453344/normal_600479a110d37.pdf
    • https://cdn-cms.f-static.net/uploads/4421615/normal_5fea32374c8e9.pdf
    • http://realwockyc.info/livolotaphxba.pdf
    • https://cdn-cms.f-static.net/uploads/4376870/normal_605043e8c9627.pdf
    • http://lasns.fun/43293774383n1yil.pdf
    • http://tokio-2020.fun/wosomop93f81.pdf
    • http://sale20.site/67705126929q1771.pdf
    • https://static.s123-cdn-static.com/uploads/4414682/normal_5ffe51d956ac3.pdf
    • http://akfb.online/estadistica_descriptiva_e_inferenciaxoc9o.pdf
    • https://cdn-cms.f-static.net/uploads/4387428/normal_601469ba4f056.pdf
    • http://meetsoda.club/malunovujewenfktl5.pdf
    • https://static.s123-cdn-static.com/uploads/4529893/normal_5ff3e8e964487.pdf
    • http://app-3null.com/448064310643i1uv.pdf
    • http://bitcoinlearningcentre.online/dowipasf9z.pdf
    • https://cdn-cms.f-static.net/uploads/4424024/normal_604798e29f0fc.pdf
    • http://blekrossi.ru/530983030061jwfv.pdf
    • http://hookup157.fun/58016910255orctc.pdf
    • https://cdn-cms.f-static.net/uploads/4483335/normal_6063ad21a6517.pdf
    • http://emmetrix.net/76452946179uwzp4.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/b87708f7-49cd-4766-aa72-84ec73105d30/apple_ipod_nano_1st_generation_battery.pdf
    • https://uploads.strikinglycdn.com/files/d92dd503-75e5-45aa-a2eb-4efd56834de6/does_monat_give_you_a_free_cadillac.pdf
    • https://uploads.strikinglycdn.com/files/2d2c9e19-4a74-499e-91e8-4c1386843315/176948746.pdf
    • https://uploads.strikinglycdn.com/files/aae17f18-1b96-4f6e-8c18-35429970b934/zurumapejazegisa.pdf
    • https://uploads.strikinglycdn.com/files/5701059f-d711-4935-8e08-9cc73d3e9ca4/31569194340.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001045a.bin
897157aa8a60e57089d87d9965ca3436b7747c30dc97ca94d2a1928a4a2b0d1a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1045A 4960 bytes
font_01_sfnt_off00011540.bin
ff6c320cc9abceef5706ae6ff1f70b8471b846d44dd500423043d6d3d8f6f7eb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11540 10956 bytes

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