Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2cb9a56d12a9fcc…

MALICIOUS

PDF

79.5 KB Created: 2021-03-28 18:48:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8388a42d5c2e5753c1e513bdf7147387 SHA-1: bc1fc63f07c153eebc66bc0ea9d77ab81ce767bd SHA-256: c2cb9a56d12a9fcc5986fcf22ba29acaca3db41552f169871cfb8fb2c5d2ec1f
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, specifically as a phishing trojan. It contains an embedded URI pointing to 'https://golowaki.ru/wix?keyword=pure+monopoly+means', which is a strong indicator of a phishing or malware distribution attempt. While no scripts were explicitly extracted, the PDF structure and the presence of external URIs suggest an attempt to redirect the user to a malicious site.

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://golowaki.ru/wix?keyword=pure+monopoly+means
    • http://feruwikabi.iblogger.org/tasovamigen.pdf
    • https://cdn-cms.f-static.net/uploads/4425009/normal_601df7ac81c69.pdf
    • http://helpcopyright-service.com/546287042293h7kj.pdf
    • https://cdn-cms.f-static.net/uploads/4467936/normal_6022be0b14642.pdf
    • https://cdn-cms.f-static.net/uploads/4460060/normal_5fe90c49805cd.pdf
    • http://classkaod.ru/pusidosmhy4w.pdf
    • http://goodxday.xyz/gerund_infinitive_grammar_exercisesq59et.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/b9549bed-51b6-4530-893c-4c4ce81d11ef/dugipoju.pdf
    • https://uploads.strikinglycdn.com/files/0e5ea046-00c2-4657-b53c-627e90087808/vopifitevino.pdf
    • https://uploads.strikinglycdn.com/files/83d5ac4d-cb76-4890-839d-fe25cebbc4bc/11143304006.pdf
    • https://s3.amazonaws.com/latufenaw/decimalformat_java_locale.pdf
    • http://nimozan.epizy.com/wusidasudeduw.pdf
    • https://s3.amazonaws.com/sugowubuf/quiz_logo_game_answers_level_retro_2.pdf
    • https://uploads.strikinglycdn.com/files/720c0541-61da-4117-a733-d084bb965cdc/gejufuxakirezakulufikati.pdf
    • https://s3.amazonaws.com/fekife/65171762644.pdf
    • https://uploads.strikinglycdn.com/files/e82bac72-c3d9-482d-b656-8c4232fe31e1/fegarozon.pdf
    • https://s3.amazonaws.com/dusubonifu/fuzopowaki.pdf
    • https://uploads.strikinglycdn.com/files/47af3f02-0e5a-40b3-8918-6b413b8bdd67/11427207797.pdf
    • https://uploads.strikinglycdn.com/files/aa1403b0-3633-47b8-895d-3062f43fa52f/scotsman_ice_machine_parts_manual.pdf
    • https://s3.amazonaws.com/zolerazowubow/what_is_newspaper_media.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_off0000facf.bin
886b4190bfb81fcb480a178115e73ce2abf178d6677398141186980e65953206
pdf-font-stream PDF embedded font (sfnt) at offset 0xFACF 5068 bytes
font_01_sfnt_off00010bf5.bin
5cd37c6851b0652cb214fe0f6b4e64062ce92ccf6f83636c07f71293f598e5fd
pdf-font-stream PDF embedded font (sfnt) at offset 0x10BF5 10892 bytes