Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ae329ccc2743d61…

MALICIOUS

PDF

72.1 KB Created: 2020-12-16 08:51:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 5677cb4137c2546b52fd4921eec80494 SHA-1: bfce0d0e7f1b86e57bb906caccdc26ee2d513941 SHA-256: 9ae329ccc2743d619a56e332fadd9cc50c3ab4252470ba02c9ec54f13e790452
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, specifically identified as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, likely intended to trick the user into visiting a malicious website. The document body, though heavily obfuscated, suggests a lure related to a 'game of thrones office pool pdf'. No scripts were extracted, but the presence of an external URI and the phishing classification strongly indicate a social engineering attack.

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=game+of+thrones+office+pool+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4393644/normal_5f906b4699351.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385235/normal_5fcc9be69fc48.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380080/normal_5f8d189e7349e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481820/normal_5fd9162bac431.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393890/normal_5f9a882bf1e59.pdfIn PDF document text
    • https://wesodopudo.weebly.com/uploads/1/3/4/2/134234684/39f7b53.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://static1.squarespace.com/static/5fc53d83c6229360ecc95cda/t/5fcde29a83d2ac65cc35f69a/1607328410361/13917088557.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc66b1c3398ff7515537f6c/t/5fcedc618b174454e98f4116/1607392353446/64830500461.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc27b67c14dfd36fefb9266/t/5fcbf509f94b6402b203a1fa/1607202057935/botuvajakigimu.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5d53abda9c57a97e000d3/t/5fc72e5ca038a451bce873ea/1606889052413/dota_underlords_tier_list_2020.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0be4612facd59ceac2d5b/t/5fc35cf7bc819f1cf443b4a5/1606638842406/write_the_outer_electron_configuration_for_alkali_metals.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cde1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDE1 5216 bytes
SHA-256: 5278bec98ba01ae91478918a48c93d7c0cfd24e4b32917661bcef3dafa2cb24d
font_01_sfnt_off0000df79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF79 11064 bytes
SHA-256: 0791ffec26cab0673eb9a4c530648a72cf94d25488a532e89498d1748d6dd2fa
font_02_sfnt_off00010526.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10526 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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