Malicious PDF — malware analysis report

Static analysis result for SHA-256 60e1b1219342fd53…

MALICIOUS

PDF

96.9 KB Created: 2021-03-13 23:48:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: c20495942766a7aeb1d43a5f0a88a156 SHA-1: 9d4b60fbe5f4badeedb88d7f2842234c5391eb8e SHA-256: 60e1b1219342fd538a807c5360e01c328355d9318649659927c8fe28bbcfbdbf
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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://dugedepap.ru/123?utm_term=jinja2+template+inline+if PDF link annotation
    • http://uscarins.info/10591961921nqefy.pdfIn PDF document text
    • http://marketeuro.pro/16611269689c3ne6.pdfIn PDF document text
    • http://vashmaster.info/a_raisin_in_the_sun_differences_between_movie_2008_and_bookbl74o.pdfIn PDF document text
    • http://zdorovienashevse.xyz/529414692556n98l.pdfIn PDF document text
    • http://totalcreditcheck.info/litojawativegalat9rdnb.pdfIn PDF document text
    • https://cdn.sqhk.co/rorajakura/sVY6jih/rhubarb_coffee_cake_recipe_with_buttermilk.pdfIn PDF document text
    • https://cdn.sqhk.co/vugasoveg/li4QD5F/gasakunudixu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501037/normal_60391e9248b6e.pdfIn PDF document text
    • http://makamar.tech/24442712274gjgva.pdfIn PDF document text
    • http://alisaborodaenko.design/comparing_communism_and_socialism_worksheet0pbtq.pdfIn PDF document text
    • http://pannochki-art.com/chopin_raindrop_prelude_sheet_music_free2v6tp.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381102/normal_6041e452eed70.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379359/normal_60412e8d7eb38.pdfIn PDF document text
    • https://cdn.sqhk.co/pilimisoduk/jatIAJq/12083694756.pdfIn PDF document text
    • http://babbieshop.ru/rinofoluwozuzojapudatuz53u4l.pdfIn PDF document text
    • http://bugamuwilozibil.22web.org/peter_drucker_quotes_on_leadership.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fejozimi.epizy.com/magic_the_gathering_card_value_guide.pdfIn PDF document text
    • http://nibejodawugizex.rf.gd/mediafre_clash_royale.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_off00013b5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B5D 4968 bytes
SHA-256: 50a4930a38321c48d6c78e800cc495a804709cadff2656f0b0fad5f311734c8b
font_01_sfnt_off00014c45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14C45 11940 bytes
SHA-256: f8bb593f5ac3fcf028833e4b07a4633ee4d758da527ea17c0471814db22fd07a

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