Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a807486312ffbfb…

MALICIOUS

PDF

70.3 KB Created: 2021-01-04 19:19:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 8aa18e209521882624f121509e0d5dd1 SHA-1: b689b0313bd218fa82bde696b4ba2f2cbb01f2bb SHA-256: 3a807486312ffbfb0519991dd89fbace5ece352a2a3a97ad010ee1b43e678dfe
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 URL that impersonates a technical datasheet, likely to trick the user into clicking it. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect the user to a malicious site, potentially for further exploitation or credential harvesting.

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://trafficel.ru/square?utm_term=fireeye+hx+4400+datasheet PDF link annotation
    • https://cdn.sqhk.co/vutexexukus/jb4idig/boss_battle_games_facebook.pdfIn PDF document text
    • https://cdn.sqhk.co/liregevo/haWhcii/4464349194.pdfIn PDF document text
    • https://niwifexugebap.weebly.com/uploads/1/3/5/3/135316215/3017993.pdfIn PDF document text
    • https://zebazowis.weebly.com/uploads/1/3/4/3/134310266/milunalin.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380068/normal_5f9291caae31e.pdfIn PDF document text
    • https://saxexowiki.weebly.com/uploads/1/3/0/9/130969873/kemav.pdfIn PDF document text
    • https://sukowaletudevux.weebly.com/uploads/1/3/0/8/130874669/8405495.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/vatakefojunib/88932940169.pdfIn PDF document text
    • https://s3.amazonaws.com/ganubatebedoxez/99894953497.pdfIn PDF document text
    • https://s3.amazonaws.com/vasofirida/59874132941.pdfIn PDF document text
    • https://s3.amazonaws.com/tomaxade/formulierungen_englischer_brief.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_off0000d274.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD274 5236 bytes
SHA-256: 89ece7d888f709bc50e78eaad583646f99ae028005d49bfaf4013fd866bffb74
font_01_sfnt_off0000e44d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE44D 12180 bytes
SHA-256: ec84ffe34d111b5be9d2fa184d9130bdf4c06ebec594c706fc1c6a39796c5800