Malicious PDF — malware analysis report

Static analysis result for SHA-256 a83f2a6d6bab79ee…

MALICIOUS

PDF

75.2 KB Created: 2021-01-30 13:44:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: c70dd28ca8a4bed5b23c7fcf80cf3d20 SHA-1: 23f5916a7a4112b6ca006ba4982d1c7af7308df5 SHA-256: a83f2a6d6bab79ee5372f1c1d22e92bf6a8db6adb118956da105a2309f68f02c
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The embedded URL points to a suspicious domain, suggesting a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the PDF structure and embedded URI heuristic indicate it's designed to redirect the user to a malicious external resource.

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://baarspo.ru/aws?utm_term=missing+noir+m PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4410201/normal_5fd3855a7bb9a.pdfIn PDF document text
    • https://cdn.sqhk.co/gabazumad/cigM4gj/smart_launcher_5_pro_review.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382617/normal_60005957df592.pdfIn PDF document text
    • https://cdn.sqhk.co/bokirebi/iQ76Dha/80501872687.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446774/normal_5ffaa9e1c9b88.pdfIn PDF document text
    • https://cdn.sqhk.co/towafeniruje/wgfIo0p/fuel_rewards_promo.pdfIn PDF document text
    • https://cdn.sqhk.co/mafowixodi/ivhdeIk/country_road_trip_songs_2018.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/lanorolowu/kodowovetewukamafote.pdfIn PDF document text
    • https://s3.amazonaws.com/nigimul/get_ielts_band_9.pdfIn PDF document text
    • https://s3.amazonaws.com/tumasun/58387155292.pdfIn PDF document text
    • http://nazonuretowu.epizy.com/podez.pdfIn PDF document text
    • http://jesebikalag.epizy.com/ayub_bachchu_shei_tumi.pdfIn PDF document text
    • https://s3.amazonaws.com/mujesogi/govorujotobafotowu.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dfc2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFC2 4360 bytes
SHA-256: 1a00dce99dfa52ee53a43309e0cd4eee784f50b303f7116b32fd8476a2065910
font_01_sfnt_off0000ee57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE57 10516 bytes
SHA-256: f562d01528aa6150827f2ed11600a75025540b566d43f8615f8bbbe0f87e3a2d
font_02_sfnt_off0001124b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1124B 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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