Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6f44191f8e05996…

MALICIOUS

PDF

77.7 KB Created: 2021-03-21 06:25:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: c576b226185f745cf2f70f005d799757 SHA-1: 853b420485a538c90bc85b5c1841686cf05e649b SHA-256: a6f44191f8e05996c0539864a786f52dfb42e45d65f4c4dbd8904b8332908ce5
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 0.9994

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://soxebez.ru/award?keyword=bihar+b.+ed+cet+2020+question+paper+pdf PDF link annotation
    • https://cdn.sqhk.co/minamojazi/fgiha3U/matchington_mansion_levels.pdfIn PDF document text
    • https://cdn.sqhk.co/retagigimusa/hdTIiik/lumapetesab.pdfIn PDF document text
    • https://cdn.sqhk.co/jojikoxazew/O3gcihO/free_real_estate_flyer_templates_indesign.pdfIn PDF document text
    • https://xanixozejalupu.weebly.com/uploads/1/3/4/8/134873627/2029385.pdfIn PDF document text
    • https://cdn.sqhk.co/lixijadimit/Iie97Mi/35471020409.pdfIn PDF document text
    • https://belexikezetuvom.weebly.com/uploads/1/3/0/7/130775063/xijolebiw.pdfIn PDF document text
    • https://cdn.sqhk.co/ranemagesoga/icJ7has/wsdot_traffic_control_plans.pdfIn PDF document text
    • https://puziwurawube.weebly.com/uploads/1/3/1/8/131871408/f3f0e984d.pdfIn PDF document text
    • https://cdn.sqhk.co/gufuluzibos/etMghyB/35299003903.pdfIn PDF document text
    • http://ridovise.sportsontheweb.net/mejikokigeboxi.pdfIn PDF document text
    • https://cdn.sqhk.co/falugojafat/bhdic11/dual_universe_full_release_date.pdfIn PDF document text
    • https://cdn.sqhk.co/tekuligote/NAgfHia/wakukijojefe.pdfIn PDF document text
    • https://cdn.sqhk.co/pepupiribojo/hjajenR/clock_timer_countdown_download.pdfIn PDF document text
    • https://cdn.sqhk.co/dojopaxitovi/jd6hcjb/flex-_flow_vs_flex-_direction.pdfIn PDF document text
    • https://cdn.sqhk.co/dulidara/Prjbhim/happier_music_video_ed_sheeran.pdfIn PDF document text
    • https://cdn.sqhk.co/fapulelenuvi/jfljiAJ/votamufosimusowow.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
    • http://zalatikewal.atwebpages.com/58918004666.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c9078d58-ecd9-41aa-b3e9-99dc3c750c2f/10899558674.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4aadbd28-4b9d-4e18-85fc-a33eaa085922/how_to_factory_reset_gatehouse_lock.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/63786738-f251-4b7e-a85e-e4de2da7f035/gexanizarodoxulezeno.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd2270f5-9ca3-4470-a217-98f7eb6f7292/janiribolilunadumakak.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#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_off0000e991.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE991 5716 bytes
SHA-256: d8c1be3889f8eb6f30c5b0028f38af1fb49af8ef6ffc4ab0f8265bcf861a47c6
font_01_sfnt_off0000fcf6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCF6 10760 bytes
SHA-256: b41a77217f8a49578f7a3e1380fb600e2cd9e65b576bec672a07f5c18da8107c
font_02_sfnt_off000121a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121A9 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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