Malicious PDF — malware analysis report

Static analysis result for SHA-256 5da2a6e725d6c93b…

MALICIOUS

PDF

101.7 KB Created: 2021-05-12 03:49:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: f9322423dee8ddbf6863977dddfec037 SHA-1: b02d27d31ac67a1335bf49ae27a5983bbd209e57 SHA-256: 5da2a6e725d6c93bb49cad7a0ab6fee2222b0a18656f75cb7470ca56518fd401
126 Risk Score

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 0.9994

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=remington+700+adl+review+shooting PDF link annotation
    • https://cdn.sqhk.co/mazonixun/naihFjd/38828130504.pdfIn PDF document text
    • https://cdn.sqhk.co/torevebeti/elghjgc/calisthenic_movement_video.pdfIn PDF document text
    • https://cdn.sqhk.co/boxewemutox/f5jgdhe/lyrica_generic_brand.pdfIn PDF document text
    • http://fuxuxixigu.scienceontheweb.net/3580164684.pdfIn PDF document text
    • https://cdn.sqhk.co/sopiloroda/fGhdhdp/i_remember_everything_lyrics_john_prine.pdfIn PDF document text
    • http://tefuvawilutir.mypressonline.com/latafi.pdfIn PDF document text
    • http://nakijeku.mygamesonline.org/brain_on_fire_libro.pdfIn PDF document text
    • https://cdn.sqhk.co/kofuvufexo/jcjgF3t/adidas_cricket_bowling_spikes_shoes.pdfIn PDF document text
    • https://cdn.sqhk.co/mukibusu/diigdIk/duxabogikuzizofifunufase.pdfIn PDF document text
    • https://cdn.sqhk.co/tigadikem/gQDgggj/9120674440.pdfIn PDF document text
    • http://viwafuxofiseko.getenjoyment.net/antrenmanlarla_geometri_2._kitap.pdfIn PDF document text
    • http://vukofalizukulo.22web.org/sociology_books_for_ias.pdfIn PDF document text
    • https://cdn.sqhk.co/xoxapivasif/b7Oihii/xanopawiser.pdfIn PDF document text
    • https://cdn.sqhk.co/vifejoneses/KtiijgZ/nonfiction_book_report_sample.pdfIn PDF document text
    • https://cdn.sqhk.co/xivomojuf/iiaLWhe/top_congo_minembwe.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bowegasobufur.myartsonline.com/schumacher_xc103w_battery_charger.pdfIn PDF document text
    • http://zuvuvejuxika.epizy.com/handbook_of_child_psychology_social_emotional_and_personality_development.pdfIn PDF document text
    • http://todidetiped.onlinewebshop.net/56753102039.pdfIn PDF document text
    • http://jatoxat.atwebpages.com/how_does_buffalo_wild_wings_pay.pdfIn PDF document text
    • http://nefigubisi.epizy.com/esl_pronunciation_maze.pdfIn PDF document text
    • http://fanopuluxekaka.epizy.com/mubipoduvomo.pdfIn PDF document text
    • http://josesomesube.myartsonline.com/application_for_sick_leave_in_college.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_off00013b63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B63 3016 bytes
SHA-256: 07efd4b5ce35fe43d562a47bea6ca2be7e52a32f6dbf0d49a2a72276c44a66d1
font_01_sfnt_off0001461e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1461E 5620 bytes
SHA-256: 99be13770fbb852aadab2fec6b6104d08fa0a93f461ed9d5aea1b81b25d4b4ef
font_02_sfnt_off00015926.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15926 14152 bytes
SHA-256: f337b0ec20a1f023151164af4830a87ed62e55b5d89658677b530ceb62b7c6ae

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