Malicious PDF — malware analysis report

Static analysis result for SHA-256 bdfd3ca02551d6df…

MALICIOUS

PDF

71.3 KB Created: 2021-04-04 13:08:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a0bc6dc9cf934e546440e76bfc3a5dd0 SHA-1: 9b68067ce3d1e071441a6da7ad8d2ffe0238ff2b SHA-256: bdfd3ca02551d6df10ed4cf80d3e6c141ad14004c4e0552e34d031bda6a6b447
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to a suspicious domain, which is likely used to host a phishing page or deliver a secondary payload. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the presence of external URLs and the ML/AV detections strongly suggest a phishing or malware distribution attempt.

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://druttle.ru/wix?keyword=scott+watson+test
    • http://ryursew.space/alcatel_go_flip_v_phone_manualtwbrh.pdf
    • https://cdn-cms.f-static.net/uploads/4386834/normal_603b18ab289da.pdf
    • https://cdn.sqhk.co/ledodatefu/ianihUW/49144741449.pdf
    • http://speak4pro.com/mejetusukikegedenelatelopqopk.pdf
    • https://cdn.sqhk.co/sowuwinadapu/Hjbghif/best_app_to_learn_drawing_ipad.pdf
    • http://help-verification.com/974212233385hatm.pdf
    • https://cdn-cms.f-static.net/uploads/4406809/normal_603fd5e1d1403.pdf
    • http://rubka.space/parallelism_worksheet_with_answersla7ew.pdf
    • http://smartcreditcheck.info/3111905081l3l77.pdf
    • http://replyua.site/twilight_forest_mc_1.12.2_3.8.689_doufs7i.pdf
    • http://daddytestit.xyz/wusofujozefanunufeky9rt.pdf
    • http://all-system7.xyz/14444795261zerzq.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://8b83d164-5e56-46cc-b941-48f48810ddf3.filesusr.com/ugd/76ce43_7f2ee13fc8a64a5bb7db542baef436aa.pdf?index=true
    • https://s3.amazonaws.com/gezizefefififa/jepijazenudemuvilolo.pdf
    • https://s3.amazonaws.com/zumomasugipeno/ostrich_farm_management.pdf
    • https://s3.amazonaws.com/jexijer/57942979115.pdf
    • https://4328a374-8b5c-4134-9cef-e132ca5fc89d.filesusr.com/ugd/6732b1_b398057682754f6e9548e2b3f068ea6c.pdf?index=true
    • https://s3.amazonaws.com/gavobawum/mobagadibori.pdf
    • https://a8a70d16-e3f0-4805-b115-4d8c62c40b57.filesusr.com/ugd/82e28d_af5b7244e2324ec39454eee866e32069.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_off0000d9bb.bin
45bd17585f5d2093f77380e3fd7eddc5a0261e787e9139ac4f2019a922f11b2e
pdf-font-stream PDF embedded font (sfnt) at offset 0xD9BB 4860 bytes
font_01_sfnt_off0000ea6d.bin
ddc326fa2068136baba1308e5336d06a733735aecd865ffd5c4e3dfa82fffbf7
pdf-font-stream PDF embedded font (sfnt) at offset 0xEA6D 11224 bytes