Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d5dbf6b19c3d493…

MALICIOUS

PDF

70.3 KB Created: 2021-02-27 22:50:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: e8c06c74ab323ca5f384225741160b5e SHA-1: 579f1212f58e4db75fae547833ace8006ed28cb0 SHA-256: 5d5dbf6b19c3d493b6c04c0066ef3c414029fa1d20d351913bb69b5fef6a026c
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded URLs, many of which point to disposable hosting and are part of a link farm, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were directly extracted, the PDF structure and embedded URIs are consistent with techniques used to redirect users to malicious sites.

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://gimoguvi.ru/wix?keyword=creflo+dollar+free+pdf+books PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4408706/normal_5ffe46fc61ad6.pdfIn PDF document text
    • http://kukushka.space/3068473996kd6cr.pdfIn PDF document text
    • https://cdn.sqhk.co/mujekesire/bifniaz/religion_inc._god_simulator_game.pdfIn PDF document text
    • https://cdn.sqhk.co/daxerarugak/rSahiii/meduse.pdfIn PDF document text
    • http://all-casino.xyz/lotavejoroxepevifokenokexd6dl.pdfIn PDF document text
    • https://cdn.sqhk.co/zifeduwa/NCnWDge/cooking_fever_gems_free.pdfIn PDF document text
    • https://cdn.sqhk.co/tebefaravuz/bgcigho/banorok.pdfIn PDF document text
    • https://cdn.sqhk.co/lebereme/gibIMia/free_printable_thanksgiving_word_search.pdfIn PDF document text
    • https://cdn.sqhk.co/defisepeniba/9Oohi0g/quizzclub_family_trivia_game_with_fun_questions.pdfIn PDF document text
    • http://junijaseru.iblogger.org/what_order_do_you_read_the_rick_riordan_books.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385213/normal_5fe01949bfe8a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413370/normal_5fdab29628fd5.pdfIn PDF document text
    • https://cdn.sqhk.co/jakofawesavo/3BicoAC/halloween_dance_party_decorations.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://pebulibupa.rf.gd/nodipoferetetum.pdfIn PDF document text
    • http://wozojatoxako.epizy.com/vogagerosube.pdfIn PDF document text
    • http://jiwamig.rf.gd/renukejexadavedoloka.pdfIn PDF document text
    • http://fugewad.rf.gd/stop_outlook_ing_old_emails.pdfIn PDF document text
    • http://lijizuzinarit.epizy.com/does_vermont_castings_still_make_bbq_grills.pdfIn PDF document text
    • http://sukuvafeliji.epizy.com/jonaxelunupota.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ca69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA69 4816 bytes
SHA-256: 88d4adc68338f8239fa256a6194e3ee79a44b5ede567aa2a23f70cf23125982e
font_01_sfnt_off0000dad3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAD3 10260 bytes
SHA-256: ddaa28dc34f4ae1c390668456ad1a41715ddd155d846a31031b86e5a29693e76
font_02_sfnt_off0000fdf5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDF5 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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