Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0f060f448155191…

MALICIOUS

PDF

77.1 KB Created: 2021-01-27 01:56:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 4ed16a618e7797a552744fa674acd501 SHA-1: 845798548b7878e088a3044227c3e56a80d7b2e3 SHA-256: a0f060f44815519158c6ab336fc63dc882258388f6076b041ea58f8985d38d40
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including ML classification and ClamAV, indicating malicious intent. It contains a large number of external links, suggesting a link farm or phishing operation. The embedded URLs and document body content point towards a lure related to app downloads and business ideas, likely to trick users into visiting malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/wb?keyword=hide%20voice%20recorder%20app%20download%20for%20android PDF link annotation
    • https://cdn.sqhk.co/rigidaluta/h9tf02b/online_business_ideas_2020_philippines.pdfIn PDF document text
    • https://cdn.sqhk.co/fujalapevame/jegcgeb/baby_bella_caring_apk.pdfIn PDF document text
    • https://lupirolawa.weebly.com/uploads/1/3/1/4/131453436/31694b7.pdfIn PDF document text
    • https://cdn.sqhk.co/nafumozuwe/jaP8Ugc/pagozexeron.pdfIn PDF document text
    • https://sezokifor.weebly.com/uploads/1/3/4/5/134596047/sevun.pdfIn PDF document text
    • https://cdn.sqhk.co/kagelemovo/ahcuzhb/mekagu.pdfIn PDF document text
    • https://cdn.sqhk.co/rujiwujik/jecHiiG/ufo_enemy_unknown_dos_download.pdfIn PDF document text
    • https://cdn.sqhk.co/xekemini/hiehgjc/penny_coin_collection_holders.pdfIn PDF document text
    • https://cdn.sqhk.co/dawafawux/hbMjcgd/25747950751.pdfIn PDF document text
    • https://cdn.sqhk.co/jevamivuvugi/jshfOXp/84631019581.pdfIn PDF document text
    • https://cdn.sqhk.co/gegefemorosu/iSgjel5/turbo_traffic_racing_3d_game_download.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/xunilukegez/44458539679.pdfIn PDF document text
    • https://s3.amazonaws.com/nuvukivaxiren/mokoziwaboxakijavewuditir.pdfIn PDF document text
    • https://s3.amazonaws.com/xixonu/98788914202.pdfIn PDF document text
    • https://s3.amazonaws.com/jusuberu/aeronautica_imperialis_painting_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/vunizi/64888367116.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_off0000f0f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0F4 5084 bytes
SHA-256: 92f5a8cfc4c6494ca7b01bab83f25112bcc3798c322bb37789d315c3b0be0196
font_01_sfnt_off00010266.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10266 10764 bytes
SHA-256: 510362e3e3fedd5a286478e8927a66ea051824e4c741c2a0d56f8b3857edf95b

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