Malicious PDF — malware analysis report

Static analysis result for SHA-256 784095209f40f545…

MALICIOUS

PDF

71.8 KB Created: 2020-11-14 00:55:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5a3e65d746da74e862bf967d3d7e1b28 SHA-1: 591360b1049bf200989da3fc71f30ea8e0857386 SHA-256: 784095209f40f545786491e18cbf075b94d368e2f82aaf9b592ff53f8a61ed34
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to 'trafffe.ru', which is likely a phishing or malware distribution site. The document body, though heavily obfuscated, suggests a lure related to a 'Tex avery wolf meme', which is a common tactic for social engineering.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://trafffe.ru/123?utm_term=tex+avery+wolf+meme
    • https://cdn-cms.f-static.net/uploads/4418370/normal_5fa1b5cc74abe.pdf
    • https://cdn-cms.f-static.net/uploads/4393018/normal_5f96c3a91f5e1.pdf
    • https://cdn-cms.f-static.net/uploads/4459922/normal_5fa4ba2f80c52.pdf
    • https://cdn-cms.f-static.net/uploads/4383452/normal_5f9a0e878abee.pdf
    • https://cdn-cms.f-static.net/uploads/4365612/normal_5f86fa48e4564.pdf
    • https://cdn-cms.f-static.net/uploads/4367952/normal_5f91b27c2ea96.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/c85a9eae-2bc5-4b2f-b3f7-1db7bca3c557/2939771911.pdf
    • https://uploads.strikinglycdn.com/files/3be06d48-8d72-4069-9766-3747410f6ac2/12672081689.pdf
    • https://uploads.strikinglycdn.com/files/04714f16-3a6f-4579-b0ba-ae5516fc3eb3/google_docs_apk_download.pdf
    • https://s3.amazonaws.com/bokexizometun/from_monogamy_to_polygyny.pdf
    • https://s3.amazonaws.com/nitajosasa/2020_military_pay_chart_bah.pdf
    • https://uploads.strikinglycdn.com/files/082890c3-a37f-470f-9da2-1c4cd61a0358/adaptive_motion_trainer_calories.pdf
    • https://s3.amazonaws.com/felasorarabipis/54396913919.pdf
    • https://s3.amazonaws.com/zidenigad/usa_map_river_systems.pdf
    • https://uploads.strikinglycdn.com/files/05c62b4e-3b20-44e1-903c-3862201888ef/76479177920.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cf34.bin
ff4f638da4f3ce4f724d151f11e3eaeb7cc91caf78fbd663c3217eb9a00205e9
pdf-font-stream PDF embedded font (sfnt) at offset 0xCF34 4560 bytes
font_01_sfnt_off0000decf.bin
c45ea085b8bc007a475cdcc37c4cacdeea2ff900a2dcc6885fc3b9b9877a66f4
pdf-font-stream PDF embedded font (sfnt) at offset 0xDECF 11072 bytes
font_02_sfnt_off00010467.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176
pdf-font-stream PDF embedded font (sfnt) at offset 0x10467 4324 bytes