Malicious PDF — malware analysis report

Static analysis result for SHA-256 52fdb9c11b5dceb4…

MALICIOUS

PDF

70.6 KB Created: 2021-03-30 02:14:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2865ad973196b241933d03f71f02fec6 SHA-1: 935f62956574526fe93920a55e4d8faec94af972 SHA-256: 52fdb9c11b5dceb407a497fec309e07d9b34b1f53cd0b7bf1d9b9ee550455d60
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, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, with the primary one being 'https://botokaw.ru/wix?keyword=words+that+start+with+ca', likely serving as a lure to a phishing or malware distribution site. The document body, though heavily obfuscated, suggests a deceptive pretext related to 'words that start with ca'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://botokaw.ru/wix?keyword=words+that+start+with+ca
    • https://mexavabawidusa.weebly.com/uploads/1/3/4/3/134375000/8631800.pdf
    • https://cdn-cms.f-static.net/uploads/4476140/normal_603b2fe14de67.pdf
    • https://static.s123-cdn-static.com/uploads/4367644/normal_5ffdd32297326.pdf
    • http://diwokaxojizo.iblogger.org/fujiweku.pdf
    • https://gegirugotosizuk.weebly.com/uploads/1/3/5/3/135397722/d9f93f52ac560b4.pdf
    • https://xunijududivajol.weebly.com/uploads/1/3/0/9/130969830/1454401.pdf
    • https://mizovitima.weebly.com/uploads/1/3/4/2/134266674/7968334.pdf
    • https://setuwome.weebly.com/uploads/1/3/0/8/130874340/8527432.pdf
    • https://static.s123-cdn-static.com/uploads/4379385/normal_5fde9d4634f79.pdf
    • https://zulijijala.weebly.com/uploads/1/3/0/7/130740393/3201729.pdf
    • https://cdn-cms.f-static.net/uploads/4415756/normal_6048439883669.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/wiwuxot/15653884096.pdf
    • https://uploads.strikinglycdn.com/files/f2dae540-d87f-4d7f-834b-d458ee89ec9f/how_to_use_ps3_controller_on_pc_without_software.pdf
    • https://s3.amazonaws.com/fakuguvil/41778072383.pdf
    • https://s3.amazonaws.com/punurum/oxidation_of_fatty_acids.pdf
    • https://uploads.strikinglycdn.com/files/911acedc-5050-4520-bdd5-7387f3d1389c/daforijumuk.pdf
    • http://fetalinato.epizy.com/kurejibutumujikawege.pdf
    • https://uploads.strikinglycdn.com/files/73f518e4-6b95-4e82-998e-1916bf793341/tecumseh_6.5_hp_carburetor_linkage_diagram.pdf
    • http://fobifuv.epizy.com/jonazelavafagaruzujur.pdf
    • http://zajukefed.epizy.com/51552417715.pdf
    • https://uploads.strikinglycdn.com/files/6a75bc52-5f64-41f2-92a9-384b09e8eedb/17009927970.pdf
    • https://uploads.strikinglycdn.com/files/9a2d3c3b-93b1-4310-b232-869e87ad644f/modern_calligraphy_kit_for_beginners.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_off0000d763.bin
14059ea8d382d7ddf4b5ea1c40692f52f33f393b0895c0255b1f2e59a6eea5fc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD763 5100 bytes
font_01_sfnt_off0000e8ca.bin
68fea179ff40a794817aa64673c870d72b35d5121f13ddff8e66e2abf9ea7f63		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE8CA 10668 bytes

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