Malicious PDF — malware analysis report

Static analysis result for SHA-256 56becb831bdda2cf…

MALICIOUS

PDF

80.8 KB Created: 2021-03-16 20:32:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 63a74cc84994a602adfa77656a342bff SHA-1: 76b2dfa6c7e9d057b02e6d56fb1b641479901fe6 SHA-256: 56becb831bdda2cf85d4194c1009f1e637d8b9c729e7ddddb2778701f8fa0fe9
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 0.9997

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://jacksth.ru/award?keyword=dark+crystal+creation+myths+pdf PDF link annotation
    • http://bawazofo.getenjoyment.net/51101191138.pdfIn PDF document text
    • http://lishop.site/97894189194yxcae.pdfIn PDF document text
    • http://kartaidatodemeleri.com/minecraft_banner_template_v3q7zcw.pdfIn PDF document text
    • http://tonerinkstore.com/7268633959360ln1.pdfIn PDF document text
    • http://lnstagramverifiedbadge-form.com/fun_kid_places_in_jacksonville_florida8mm8p.pdfIn PDF document text
    • https://tugofemupufere.weebly.com/uploads/1/3/4/5/134584107/89c92ba2727.pdfIn PDF document text
    • https://bokoxopeke.weebly.com/uploads/1/3/4/2/134266118/nawibivitegi-bawapuvagudo.pdfIn PDF document text
    • https://cdn.sqhk.co/remokuvupen/eFnihiy/hungry_shark_game_download_hack.pdfIn PDF document text
    • https://cdn.sqhk.co/gobajejuz/WxhgjeG/5534079476.pdfIn PDF document text
    • http://obsluzhivanie-kompyuterov.moscow/752616707208lq3i.pdfIn PDF document text
    • https://timelasabo.weebly.com/uploads/1/3/4/3/134345700/kubuzetugi.pdfIn PDF document text
    • https://cdn.sqhk.co/kowalaxu/hhhFuQy/42434828195.pdfIn PDF document text
    • https://cdn.sqhk.co/filomada/4ibjbib/nukelekibojowuk.pdfIn PDF document text
    • https://cdn.sqhk.co/fowijuseziju/jgjiiii/sports_bike_photos_download.pdfIn PDF document text
    • https://xovipapapili.weebly.com/uploads/1/3/0/8/130873893/pavoxifevaram.pdfIn PDF document text
    • http://reduslimitaly-ufficiale.site/30959039133zqwmi.pdfIn PDF document text
    • http://repair-monokoles.ru/jepogozirikepan576w.pdfIn PDF document text
    • http://pirewarekow.mywebcommunity.org/veterinary_bacteriology_and_mycology.pdfIn PDF document text
    • http://wellwork.site/acoustical_engineering_harry_f_olson34o9e.pdfIn PDF document text
    • https://simokenuma.weebly.com/uploads/1/3/5/3/135311421/d193e4cd3.pdfIn PDF document text
    • https://cdn.sqhk.co/tobamozusaj/C019hdz/90_s_pop_hip_hop.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nozozuwovore.atwebpages.com/past_tense_of_irregular_verbs_worksheets_for_grade_1.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_off0000fa70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA70 5560 bytes
SHA-256: 00ddd0cec572c6ce045ad993afa00a0437ee5a9442d83194835513f88fe5b44c
font_01_sfnt_off00010d42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D42 11316 bytes
SHA-256: 8e7023a45cf9f8253873d2d2dffd21759f959e8e919fb7d429fa954ee16ec93c

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