Malicious PDF — malware analysis report

Static analysis result for SHA-256 112c056c8575b7a7…

MALICIOUS

PDF

72.5 KB Created: 2021-04-01 02:04:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: ed32d6835434c31ee09222817dbb22d7 SHA-1: 86bcf690f2b33bd962e68bfbc1b3fc4b7553b0a4 SHA-256: 112c056c8575b7a7bc2ef60b1faa56e440f34a33509321a8e38e4d68e7d427dc
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 0.9997

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://jottigo.ru/123?utm_term=christina+aguilera+beautiful+song PDF link annotation
    • http://2022god.com/osha_forklift_safety_rulesflj28.pdfIn PDF document text
    • https://cdn.sqhk.co/moromasi/Pihjdid/dajevariroxagadaso.pdfIn PDF document text
    • http://tejaberi.iblogger.org/45500540888.pdfIn PDF document text
    • http://alsamcctv.com/96088538185q6kd4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455406/normal_600fe8407c80f.pdfIn PDF document text
    • https://cdn.sqhk.co/dukoredod/Jjbiiia/52043265109.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412165/normal_5fd0d3dc1f8d9.pdfIn PDF document text
    • https://cdn.sqhk.co/dilizilozok/jdHo2OK/xivexalugug.pdfIn PDF document text
    • http://coupons2020.info/the_game_changers_film_online_subtitrat_in_romanaxqm1w.pdfIn PDF document text
    • http://life-news.tech/normas_apa_para_portada_de_tesisiqail.pdfIn PDF document text
    • http://idealslimitalia-ufficiale.site/8448274502jrt2x.pdfIn PDF document text
    • http://0fruit.space/5773492102386yxi.pdfIn PDF document text
    • https://cdn.sqhk.co/filemowa/dSOheje/38455310745.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385847/normal_6051ff57a2b3c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dopisudul.epizy.com/bridge_rectifier_kbpc3510_datasheet.pdfIn PDF document text
    • http://gogewarixisude.epizy.com/3853528098.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_off0000dc67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC67 5072 bytes
SHA-256: 5504f41ae4282a0afbd395e19f18be858223dd07e1dee89e9f6ce41e49478416
font_01_sfnt_off0000ed9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED9B 11548 bytes
SHA-256: 9b9f37367920d05f0f10d5843242a43fa868eb991c2cfbf2884e71afe0775950

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