Malicious PDF — malware analysis report

Static analysis result for SHA-256 a138afd3f7fa079a…

MALICIOUS

PDF

81.9 KB Created: 2021-03-07 23:43:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: f3383bba905472bc7c174ffd29e91e42 SHA-1: 93eb8e9bf88e7a45bc7747b3885ad8cd2daf7d57 SHA-256: a138afd3f7fa079a2c623126a96a0684f28c34c110441322a571aa849f56a699
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 0.9993

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://jumiwimov.ru/strik?utm_term=temple+of+sethraliss+entrance+location PDF link annotation
    • https://cdn.sqhk.co/terodekijur/9Hoghhj/24998785824.pdfIn PDF document text
    • http://teleporttur.ru/722826637189sfos.pdfIn PDF document text
    • http://pizidojokinesa.66ghz.com/foxufejexenogatox.pdfIn PDF document text
    • https://cdn.sqhk.co/tuledapozato/bsmPEhj/rugikuzirebafexulemawovig.pdfIn PDF document text
    • https://cdn.sqhk.co/zewumirapeb/igggXLF/45060730166.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465924/normal_5fcd9972ae95e.pdfIn PDF document text
    • https://cdn.sqhk.co/jawuraxexije/WvAmagj/86972087189.pdfIn PDF document text
    • http://salleapp.xyz/105376775805yj1s.pdfIn PDF document text
    • http://avtoshtorki.shop/how_to_write_a_news_article_exampleborvf.pdfIn PDF document text
    • https://cdn.sqhk.co/sitopizol/dOhdkHl/42795920161.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416302/normal_6036c8a886288.pdfIn PDF document text
    • http://bristol-yalta.run/failarmy_2020_octobersn6wf.pdfIn PDF document text
    • https://cdn.sqhk.co/nejajevafode/h5gezie/wokizu.pdfIn PDF document text
    • http://dujivodawalaxu.22web.org/what_is_computer_definition_for_class_3.pdfIn PDF document text
    • https://cdn.sqhk.co/potiribuwuf/gJ7ghek/83736580462.pdfIn PDF document text
    • https://cdn.sqhk.co/merojuniv/jeGR33t/risk_analysis_template.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449178/normal_6025615f0b35a.pdfIn PDF document text
    • http://like-store.site/5247786178heb35.pdfIn PDF document text
    • https://cdn.sqhk.co/kugefiruxat/dAie3ge/jusolozelokogasak.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rugeritubaduw.epizy.com/cancellation_insurance_policy_template.pdfIn PDF document text
    • https://s3.amazonaws.com/sojebelevenex/escape_room_game_answers_level_37.pdfIn PDF document text
    • https://s3.amazonaws.com/bufipevuril/a_cry_for_help_free_movie.pdfIn PDF document text
    • https://s3.amazonaws.com/ziwuvijevo/the_iliad_and_the_odyssey_nyt_crossword_clue.pdfIn PDF document text
    • https://s3.amazonaws.com/benubapopikaj/jikozasobibunisowajadadi.pdfIn PDF document text
    • https://s3.amazonaws.com/jeromisixinolib/baixar_jogos_psp_cso_android.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_off000101cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101CB 5204 bytes
SHA-256: 57908b215888da1963153deade62d49213b41c324b798457ddbee79bb0860acb
font_01_sfnt_off00011351.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11351 10744 bytes
SHA-256: 8a1cd26e9dd5f09f29f87ce45074920aaaf13fc0e8b2b8142c51f91c080435d7

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