Malicious PDF — malware analysis report

Static analysis result for SHA-256 617277891b5a092b…

MALICIOUS

PDF

76.3 KB Created: 2021-02-15 21:01:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 26b3760ef8123a2f43966554f3d58104 SHA-1: bc302a91656cd5e84205bfc1ce5b360d48c020f2 SHA-256: 617277891b5a092b71963ad57c6913a26bc4be4f8a68ba12f41717a12d454aa8
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 0.9998

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://crophysi.ru/strik?utm_term=what+is+a+driver%2527s+license+id+number PDF link annotation
    • http://disetikala.22web.org/zulekapugefogagila.pdfIn PDF document text
    • http://jawuzoruba.iblogger.org/nuxobazijujukonajapi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481053/normal_5fd5f2b79ce76.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421943/normal_5fe9af47ef27d.pdfIn PDF document text
    • https://cdn.sqhk.co/noperizapewo/gLijfhc/60085910705.pdfIn PDF document text
    • https://cdn.sqhk.co/goseluna/mjiuUxq/zivikipamemufadedinu.pdfIn PDF document text
    • https://cdn.sqhk.co/lupobikud/hcUjdjV/28149136377.pdfIn PDF document text
    • http://lexanizisujufum.66ghz.com/animated_motion_backgrounds_free.pdfIn PDF document text
    • https://cdn.sqhk.co/joxutedunik/XggOajg/bingo_blitz_apple.pdfIn PDF document text
    • http://allostar.buzz/nilukufipgyr1.pdfIn PDF document text
    • http://ttop-shop.com/9337270829upxjr.pdfIn PDF document text
    • https://cdn.sqhk.co/kagumuzom/hcH3Zgi/misinelepawaderudogekemob.pdfIn PDF document text
    • http://kipigonatusa.iblogger.org/46013381706.pdfIn PDF document text
    • https://cdn.sqhk.co/vekuzajomugi/ijgcmji/mimpi_gigi_atas_lepas_menurut_islam.pdfIn PDF document text
    • https://cdn.sqhk.co/voguzasijur/BgiCjfC/snowflake_lane_bellevue_wa_2020.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wadekazu.epizy.com/calling_on_spirit_guides.pdfIn PDF document text
    • http://gegavolaful.epizy.com/interview_definition.pdfIn PDF document text
    • http://besosive.epizy.com/owls_birds_template.pdfIn PDF document text
    • http://boxitevu.rf.gd/faithful_victory_worship_chords.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_off0000eba3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBA3 5424 bytes
SHA-256: 06578b691959c0660f9091e925acfa7ed0d490c62b84c80173c39c591900038c
font_01_sfnt_off0000fdfd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDFD 10984 bytes
SHA-256: a799e5a35186f7037678085cd741496b637131192b3d2ec961d4932d9d81c8dc

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