Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ab280fe78742e36…

MALICIOUS

PDF

69.9 KB Created: 2021-03-06 06:55:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: ca197d8ab4b941a19db9acefaaa83638 SHA-1: 150190af8ea69603aa4292d7f8e6c7199736feaa SHA-256: 7ab280fe78742e364aa257957ff7789f2a93031b54c873d65868730364737614
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 0.9996

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://xezojetit.ru/123?utm_term=daily+language+review+grade+5+answer+key+week+1 PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4392452/normal_5ffaa385dfc9f.pdfIn PDF document text
    • http://vopipiji.iblogger.org/vekegoponexubuwikuwubija.pdfIn PDF document text
    • http://bitoxifa.sportsontheweb.net/vopalalopelivisazenof.pdfIn PDF document text
    • http://valuburikodajad.medianewsonline.com/84439353233.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381340/normal_60282fb175ba1.pdfIn PDF document text
    • http://kakorixow.mygamesonline.org/kuwatovogalije.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385612/normal_5fd9a3eb6e089.pdfIn PDF document text
    • http://tapozifokun.mywebcommunity.org/rowutamirekimemege.pdfIn PDF document text
    • http://kenugizi.getenjoyment.net/black_and_decker_rice_cooker_plus_lid.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455684/normal_5ff75ee0b2836.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459629/normal_6006684663c65.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420448/normal_5fdc1ce5239c3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451353/normal_6031f9b50dc35.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tonisefoteka/bs_in_business_administration_information_systems_management.pdfIn PDF document text
    • https://s3.amazonaws.com/makixibawumebol/64290637896.pdfIn PDF document text
    • http://golujaxi.epizy.com/best_free_text_to_speech_reader.pdfIn PDF document text
    • http://bumevibil.epizy.com/carbon_cycle_questions_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d3a50037-8c5d-4490-8037-d79d25f62cb2/how_to_adjust_pilot_light_on_williams_wall_heater.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a0b1daf-2dad-4fdc-85a7-61a52b763297/kutixatujaxufe.pdfIn PDF document text
    • http://muwalolerede.epizy.com/sydney_harbour_bridge_report.pdfIn PDF document text
    • https://s3.amazonaws.com/fejakixoweka/ximanal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/97d0c721-78fa-4770-aec4-fbb683dcb8a3/vitamix_e320_accessories_uk.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_off0000d48a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD48A 5488 bytes
SHA-256: 0704176a581f5c1498802690b5155c3643440a69992cb982ea125ce3998dd00c
font_01_sfnt_off0000e779.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE779 10036 bytes
SHA-256: 17f00e03fcaf92df582b450e05886ff2b864df90d1db4edca6f281a1c3ca85a6

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