Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a009c4bb1924c01…

MALICIOUS

PDF

71.0 KB Created: 2021-03-24 18:23:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: ca51df830a64202f1216be6880e54fbd SHA-1: 5bb279b8c5ceb7c89519b9721a2d07657ced272b SHA-256: 2a009c4bb1924c0188762c50c9f41fba704ab84095a1aa7cc6e88d6f9a42636f
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9996

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://xajibur.ru/strik?utm_term=basic+technical+drawing+book+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4375350/normal_60487343092b0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379720/normal_5fda49c0ef0d2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427795/normal_605a63a02938b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486374/normal_6049cd4482470.pdfIn PDF document text
    • http://tejowigasinafu.getenjoyment.net/summary_of_a_little_life_includes_analysis_hanya_yanagihara.pdfIn PDF document text
    • http://nibakelenixezas.getenjoyment.net/66131181126.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449974/normal_605075a5194e6.pdfIn PDF document text
    • https://cdn.sqhk.co/tabewinudeka/fhhXhac/kuzutimulojotivor.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411681/normal_6003dbddab0d2.pdfIn PDF document text
    • http://gezinuduwep.medianewsonline.com/basic_of_microsoft_office.pdfIn PDF document text
    • https://cdn.sqhk.co/gegenosuzun/fNGwKhg/bollywood_movies_2007_hd.pdfIn PDF document text
    • https://cdn.sqhk.co/wezupobuwab/hBib0rj/98316633093.pdfIn PDF document text
    • https://cdn.sqhk.co/gixejefi/5DA0idr/54346942945.pdfIn PDF document text
    • http://vegunax.getenjoyment.net/8759017652.pdfIn PDF document text
    • https://cdn.sqhk.co/fowifabibu/jcidTgg/powerpoint_jeopardy_game_template.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393019/normal_601ee278aab12.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/paxunu/89540811850.pdfIn PDF document text
    • http://tulifal.onlinewebshop.net/47068000469.pdfIn PDF document text
    • https://s3.amazonaws.com/jikopot/arewa_nishadi_app.pdfIn PDF document text
    • https://s3.amazonaws.com/ratixifo/derawimujigofapivokiku.pdfIn PDF document text
    • http://maretubozewugi.myartsonline.com/calisthenics_movement_workout.pdfIn PDF document text
    • https://s3.amazonaws.com/xufoxorog/35083383116.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d5c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5C9 5760 bytes
SHA-256: a4d86c33fdec21bfac6d5251fc442778a8e4949dc9b0556a04807c97ff369fbe
font_01_sfnt_off0000e972.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE972 10480 bytes
SHA-256: aed379cd6e72b77a2dc3d1cbafebd049378600dc7543d54f8ff77120f8148b7b

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