Malicious PDF — malware analysis report

Static analysis result for SHA-256 96c652558bd6d78c…

MALICIOUS

PDF

66.8 KB Created: 2021-02-21 16:17:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 462a11855a3ef4a7f61b995f7f48f460 SHA-1: 991e9c31a0ddd72263be42dd4c46e33820eb62a3 SHA-256: 96c652558bd6d78c5159c681581cb411d9a616815f099ede28980fa60384d17e
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://seumenha.ru/wix?keyword=gas+stoichiometry+quiz+answers PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4415077/normal_5fd9a2d3c0c35.pdfIn PDF document text
    • http://worigozuwujuva.iblogger.org/60535606324.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465257/normal_5fce9a7cbe7f5.pdfIn PDF document text
    • http://levelupguild.com/mizawelo7qce8.pdfIn PDF document text
    • https://cdn.sqhk.co/rifusofuwedi/hbGgZjh/62251700541.pdfIn PDF document text
    • https://cdn.sqhk.co/wifukatar/mqRgghb/22825647955.pdfIn PDF document text
    • https://cdn.sqhk.co/dabozijide/hcH0VeW/dobafokamebawe.pdfIn PDF document text
    • https://cdn.sqhk.co/gukomoluda/fhaShit/farmer_brand_knife_sliced_noodles_review.pdfIn PDF document text
    • https://cdn.sqhk.co/maxegugej/jijhXrQ/dapajidowaluxuwotesuga.pdfIn PDF document text
    • http://discount50it.pro/guvizujujewogacgpc.pdfIn PDF document text
    • http://jobatuzuru.22web.org/sony_wireless_earbuds_wi_c300_manual.pdfIn PDF document text
    • http://skout.tech/nigerian_civil_war_video25uzz.pdfIn PDF document text
    • https://cdn.sqhk.co/gimexigerub/u2mRSia/cw_the_100_season_7_how_many_episodes.pdfIn PDF document text
    • http://healthit.space/nea_puzzle_answerslqtul.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://konapawejiwevin.epizy.com/bisajisuzivuzunekoduvo.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_off0000c78b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC78B 5408 bytes
SHA-256: f3f1be189cd507a484fa22baf428e788bf4d17049c08d03e834389f084dbb0dc
font_01_sfnt_off0000d9ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9EA 10196 bytes
SHA-256: 04a9fda76d0ca4a35667478143fb4402008a3582f11a19a52c93a0a829660cad