Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5c2a7c5436af267…

MALICIOUS

PDF

69.7 KB Created: 2021-02-21 08:07:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 8fa5f584eba9982f2fd3b86b720f5340 SHA-1: 2324bd0fa2ea7174dddee893d942f50573840c46 SHA-256: c5c2a7c5436af267c0bdc7f3176ded53a6f6529e0317a30c3f28d05c7d6f8bc1
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, specifically as a phishing trojan. It contains an embedded URL that leads to a suspicious domain, suggesting a phishing or malware distribution attempt. The document body, though heavily obfuscated, appears to reference a product review, which is a common lure for social engineering.

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://bologen.ru/123?utm_term=tone+it+up+vanilla+protein+powder+review PDF link annotation
    • https://cdn.sqhk.co/xovikojux/bTfWNhg/pb_j_sandwich_while_pregnant.pdfIn PDF document text
    • https://dujeranisijoku.weebly.com/uploads/1/3/0/7/130776063/nuzunofumona.pdfIn PDF document text
    • https://cdn.sqhk.co/kixobaza/GqhhifZ/jibukuxebujozagaxulo.pdfIn PDF document text
    • https://cdn.sqhk.co/xeloxilava/VlLNgj6/chinese_zodiac_year_of_the_rabbit_1999.pdfIn PDF document text
    • https://cdn.sqhk.co/refowofiros/dgfijia/23850849144.pdfIn PDF document text
    • https://cdn.sqhk.co/relulapezele/HeRIhgG/nejixoxubekogixi.pdfIn PDF document text
    • https://cdn.sqhk.co/xelajuwodaf/cgjCgc5/tower_keepers_gathering_storm.pdfIn PDF document text
    • https://cdn.sqhk.co/dibidoretu/Mb1hfIn/movistar_plus_apk_gratis.pdfIn PDF document text
    • https://lomofoxagut.weebly.com/uploads/1/3/4/5/134524577/a811f90065128.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/goviwigax/land_registry_fees_practice_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/mexijegedakol/kusaxisaxati.pdfIn PDF document text
    • https://s3.amazonaws.com/xowasosuf/80405797139.pdfIn PDF document text
    • https://s3.amazonaws.com/rudelazifizuvo/bachelor_party_movie_video_songs_free.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_off0000d481.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD481 4876 bytes
SHA-256: 7ff422d47a153f42d38ae421cf3ed9a7fc86bbd4a643b237e1190d294b6ca33a
font_01_sfnt_off0000e539.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE539 10692 bytes
SHA-256: 8b74789d9dc5a07eb5154776fa155ff14d2660c15123a74dfad25537a810a180

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