Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d0934f1913a4b87…

MALICIOUS

PDF

82.1 KB Created: 2021-03-28 10:22:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: e35e7fdf299baba279da9ca839900d74 SHA-1: 635c136ed36c6c93aa64bc92eb5c6d8f4de301e9 SHA-256: 3d0934f1913a4b87897b03ee3de213884c101a43a1524cd6fa1c8a1c22caf299
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains an embedded URL pointing to a suspicious domain, which is likely used to deliver a secondary payload or conduct phishing. The PDF structure and embedded content suggest an attempt to disguise malicious activity as a legitimate document.

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://golowaki.ru/award?keyword=anemia+por+deficiencia+de+vitamina+c+pdf PDF link annotation
    • https://fomunova.weebly.com/uploads/1/3/4/6/134684458/561b6e28.pdfIn PDF document text
    • http://sluzhba1.net/kewofituwuvepitomugind76aa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376369/normal_5ff6b1e4584fc.pdfIn PDF document text
    • http://arnautmebel.ru/leo_tolstoy_emperors_three_questionsjnsbi.pdfIn PDF document text
    • http://delayikapy.xyz/traffic_racer_unlimited_money_apk_iose9u8p.pdfIn PDF document text
    • http://copyright-rules-help.com/used_lexus_rx_350_for_sale_2017_mnd83n8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487641/normal_5fdc1003186e3.pdfIn PDF document text
    • https://tebafazar.weebly.com/uploads/1/3/4/2/134265880/volujozabizijo.pdfIn PDF document text
    • https://tifogufa.weebly.com/uploads/1/3/1/6/131637606/a41e52d2fd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389084/normal_5ff9fe8a46a29.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zuxime/fizimobigepogeperegi.pdfIn PDF document text
    • http://nagudakorixo.rf.gd/zuzipejoki.pdfIn PDF document text
    • http://kipafiperugava.epizy.com/37458676729.pdfIn PDF document text
    • https://s3.amazonaws.com/gowupuzokowuxes/modal_canonical_form_matlab.pdfIn PDF document text
    • http://sivigowukom.epizy.com/question_game_apps_for_android.pdfIn PDF document text
    • https://s3.amazonaws.com/jeworurowam/61092939751.pdfIn PDF document text
    • http://zonatenitisa.rf.gd/nipapoforevogekikuxifak.pdfIn PDF document text
    • https://s3.amazonaws.com/nopomewegobij/rijevixidififotosuri.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001034f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1034F 5140 bytes
SHA-256: 33841f8d2a303be46a149b18ba9f0867dc744b6a0d23b5ce9daf4cf72d859912
font_01_sfnt_off000114be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114BE 11840 bytes
SHA-256: 8fedb4d450948dcff0777ec739b88793506d954b5f73ec4fd18a12d61889dc1e

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