Malicious PDF — malware analysis report

Static analysis result for SHA-256 53715c7afed02c6c…

MALICIOUS

PDF

75.0 KB Created: 2021-03-20 10:13:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 6d98b32680fd06a7f151f106180e41f7 SHA-1: 494ac9feb1ea043bf88b13b55ada2c5d9324d27b SHA-256: 53715c7afed02c6c26bc4c0fcd6ea69c54febd3076b3f04f2738054c1e53f233
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

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 0.8479

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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
  • 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://resalured.ru/award?keyword=s.+e.+c.+r.+e.+t.+marie+adeline+pdf PDF link annotation
    • https://fosevikotik.weebly.com/uploads/1/3/1/6/131637163/9850bdce0a0.pdfIn PDF document text
    • https://cdn.sqhk.co/linewebozid/cQijhi7/64916347531.pdfIn PDF document text
    • https://cdn.sqhk.co/wosipuvetot/ifieibu/sikakulup.pdfIn PDF document text
    • http://fotubobuwenapu.scienceontheweb.net/47576813378.pdfIn PDF document text
    • https://cdn.sqhk.co/figegixo/5Pahbib/fm_radio_transmitter_app_for_android.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470821/normal_5fd71483812a0.pdfIn PDF document text
    • https://xepozumer.weebly.com/uploads/1/3/1/3/131380160/danasusirit_jememix_lorof_weriz.pdfIn PDF document text
    • https://newowuwaw.weebly.com/uploads/1/3/4/6/134634034/zenufe_nezovaj_vagag_bamikev.pdfIn PDF document text
    • http://kopogaxepaku.sportsontheweb.net/nuxugigojorerot.pdfIn PDF document text
    • https://mosugomepa.weebly.com/uploads/1/3/4/0/134096926/fabimiferoba-lugub-gopasivobidat.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494165/normal_604d9d719207c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479905/normal_5ffd0ac2c115a.pdfIn PDF document text
    • https://cdn.sqhk.co/wazotifuk/2jhijjf/ny_company_outlet_store_locations.pdfIn PDF document text
    • https://kezagoguz.weebly.com/uploads/1/3/4/1/134131769/pigit.pdfIn PDF document text
    • http://dafagaketa.sportsontheweb.net/jutobenewononunaga.pdfIn PDF document text
    • https://cdn.sqhk.co/gebitasixa/eYiiigj/top_korean_keyboard_android.pdfIn PDF document text
    • https://pujuwofox.weebly.com/uploads/1/3/4/8/134882524/julepu.pdfIn PDF document text
    • https://wanuwajazil.weebly.com/uploads/1/3/4/8/134899981/24bfd.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/b35b5174-c70b-4c03-b225-4b88692ded59/charisma_on_command_book_list.pdfIn PDF document text
    • http://nubibubimalepik.atwebpages.com/l_orthographe_illustre.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/343389c0-9f57-47f0-a450-c7dd096a5cd1/little_tikes_roadster_toddler_bed_instructions.pdfIn PDF document text
    • http://nopawalaxuwaw.onlinewebshop.net/how_to_win_game_pigeon_8_ball.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010141.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10141 4936 bytes
SHA-256: e272b8789461d15944c6cb65dcd2714fd7b293708a3fd7076f4eb93f35df2f49

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