Malicious PDF — malware analysis report

Static analysis result for SHA-256 f84b0021cacd1d5c…

MALICIOUS

PDF

64.7 KB Created: 2020-11-17 06:53:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0136ab30d6606591810eb1c3e1bc3f54 SHA-1: 1ee9af5550e3a8fb7f9f7ebca2e95cb36b9bb85a SHA-256: f84b0021cacd1d5cebe4ad8a62a997e643a6c45a6feb031164aaed1f54963ae0
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URL pointing to a suspicious domain. ClamAV and ML classifiers have flagged this PDF as malicious, specifically as a phishing trojan. The presence of an external URI and the overall detection suggest an attempt to redirect the user to a malicious site, likely for phishing or to download further malicious content.

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://traffset.ru/123?utm_term=bahram+gur+fights+the+karg
    • https://cdn-cms.f-static.net/uploads/4378834/normal_5f8b316bc17ea.pdf
    • https://cdn-cms.f-static.net/uploads/4487906/normal_5faf7bf29b974.pdf
    • https://zoniziwaxetoxa.weebly.com/uploads/1/3/4/4/134441104/tegulalelitinu.pdf
    • https://cdn-cms.f-static.net/uploads/4368745/normal_5f878293bd0d7.pdf
    • https://cdn-cms.f-static.net/uploads/4414677/normal_5fa5a6d290bcd.pdf
    • https://palifeselaliku.weebly.com/uploads/1/3/4/4/134441248/zumolemorup.pdf
    • https://jewojumafolu.weebly.com/uploads/1/3/4/6/134651010/vofomugexur-walifonolavil.pdf
    • https://wizemeleg.weebly.com/uploads/1/3/4/3/134307012/kuwox-dikadotufine.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/nosepevozux/85156619976.pdf
    • https://s3.amazonaws.com/jiwisi/advanced_excel_training_book_in.pdf
    • https://s3.amazonaws.com/jepinebawo/nofexulenopupajevubu.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_off0000c0a4.bin
6ab7a59f2cfd9549ab767e0e1368c2d03e1c010d7ddfac6c96affcb22913f640		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC0A4 5264 bytes
font_01_sfnt_off0000d264.bin
6e905233cfbde4e8db6e1bec8c0cd166506e634499a935cf06a0cb93c99bebc5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD264 10660 bytes

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