Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ad56119b59103dd…

MALICIOUS

PDF

90.5 KB Created: 2021-05-14 02:38:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e0287f3e7f80bc0816963f2f9c1e9f5c SHA-1: 8f5accb41d4d853262ba0d3836d9307c2c4a28b4 SHA-256: 8ad56119b59103dda79aa5c160413d6c515ba166825fd947e476991f0e5d6ede
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, indicating a phishing or trojan payload. It contains an embedded URI pointing to a suspicious domain, likely intended to deliver a malicious payload or redirect the user to a phishing site. The document body, though heavily obfuscated, suggests a lure related to pet weights, which is a common tactic for phishing campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://golowaki.ru/wb?keyword=how%20much%20should%20a%20netherland%20dwarf%20rabbit%20weigh
    • https://cdn-cms.f-static.net/uploads/4456667/normal_6030152b8bff0.pdf
    • http://mawiratuwulu.iblogger.org/affairscloud_static_gk_download.pdf
    • https://cdn-cms.f-static.net/uploads/4502188/normal_601ef7b4dec52.pdf
    • https://bigadamedoje.weebly.com/uploads/1/3/1/3/131384249/8695562.pdf
    • https://cdn-cms.f-static.net/uploads/4445532/normal_601e1293f0ade.pdf
    • https://ziwobusomuka.weebly.com/uploads/1/3/1/6/131607005/molowaminujijefanize.pdf
    • https://cdn-cms.f-static.net/uploads/4446635/normal_6058c74ece3fd.pdf
    • https://cdn-cms.f-static.net/uploads/4388272/normal_6037ccd6ac7dd.pdf
    • https://cdn-cms.f-static.net/uploads/4481836/normal_60651c6e2f19d.pdf
    • https://cdn-cms.f-static.net/uploads/4369327/normal_605d5ac6660b8.pdf
    • https://static.s123-cdn-static.com/uploads/4366325/normal_6000ad13dc558.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/1e67e5b1-33ce-471b-8f5c-1b8efed0add7/30743136712.pdf
    • https://9d349da1-218b-4b59-9e37-2a90cab56d40.filesusr.com/ugd/de9003_278fa2a5af394d2cb331336baed3ef31.pdf?index=true
    • https://b7b9a0d4-d71d-433a-9dbc-8293b1c729aa.filesusr.com/ugd/979434_b0706ea9ce834bf19a5e79cfacbe4e5c.pdf?index=true
    • http://tizesabukabel.rf.gd/curriculum_guide_grade_1.pdf
    • https://uploads.strikinglycdn.com/files/e85ba1be-7f9b-4f19-8732-1cc44dd27758/what_is_another_word_for_stronger.pdf
    • https://1cbf0fd9-62af-4102-a3dc-982f361539e7.filesusr.com/ugd/bfbc46_e2b1da6aeeb84f4086e4b5194be64d44.pdf?index=true
    • https://uploads.strikinglycdn.com/files/c9f85915-2767-4477-9d3a-4fb203a0801a/when_is_the_new_hunger_games_coming_out.pdf
    • https://6843e3eb-5573-46e1-90a0-370cfc2b4a0d.filesusr.com/ugd/89b1bc_094f0e2fb5b74dc4a35a0dc5ae71e7eb.pdf?index=true
    • 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_off00012080.bin
52814c401afaf31d4b1658193e3ade89e70e8e9e7918e4472def13a908f29af8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12080 5628 bytes
font_01_sfnt_off0001338d.bin
86ed597aa22f25f636c43c86aa141b66d6be85f138b12a8fb0f38e30d8182f48		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1338D 11588 bytes

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