Malicious PDF — malware analysis report

Static analysis result for SHA-256 39a02c08ccf5610c…

MALICIOUS

PDF

73.4 KB Created: 2021-03-20 02:19:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 2cc8926102380e53d4e8facd3e97b9d4 SHA-1: a43ae46be79fdbf3e983dc4177202a64285b29b1 SHA-256: 39a02c08ccf5610cea68f34dc07b03e89b2551238b7c91519f359d8e3e15206f
126 Risk Score

Malware Insights

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

The PDF contains an embedded URL pointing to fokemale.ru, which is flagged as suspicious. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the PDF is part of a link farm on disposable hosting, suggesting a phishing or scam attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to a phishing site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://fokemale.ru/award?keyword=analog+multimeter+manual+pdf PDF link annotation
    • http://fruitslope.online/clarinet_music_sheets_easy391dw.pdfIn PDF document text
    • https://marajivo.weebly.com/uploads/1/3/4/8/134878422/1869470.pdfIn PDF document text
    • http://cmbclientes.com/sibakickw9.pdfIn PDF document text
    • https://wowimenus.weebly.com/uploads/1/3/4/7/134709331/bf182c5.pdfIn PDF document text
    • http://electorat.org/resiburokabogobefololawoskvou7.pdfIn PDF document text
    • http://repaircreditscore.info/88653345995klnz1.pdfIn PDF document text
    • https://cdn.sqhk.co/mepapogivoma/yjd5heO/22558502280.pdfIn PDF document text
    • https://cdn.sqhk.co/lapefuxolu/9RgfQhi/2746986834.pdfIn PDF document text
    • http://se-mrush.com/ramatojilutogdxjz.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/7d275a7a-5909-4938-a100-51291afd12b4/american_gods_trailer_1_temporada.pdfIn PDF document text
    • http://xupoputidug.rf.gd/nespresso_e_gift_card_uk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/36f7afbf-0d3a-47fa-af91-c6e65387f3f9/why_rich_getting_richer.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxutedi/kinopodarokugoxitam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f744074-277a-4e8d-ba76-a9df5627545d/8047995631.pdfIn PDF document text
    • http://zixinakivuliw.epizy.com/sansa_clip_replace_battery.pdfIn PDF document text
    • https://s3.amazonaws.com/fekaduvopigab/mechanical_vibrations_ss_rao_5th.pdfIn PDF document text
    • http://wanudozadix.rf.gd/wepusaje.pdfIn PDF document text
    • https://s3.amazonaws.com/paxivogedewilu/66733193988.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_off0000e117.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE117 5172 bytes
SHA-256: 12395bb0af7aacb477f35ce625119d7c7d5626595704405477bac371f4b92810
font_01_sfnt_off0000f29a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF29A 11196 bytes
SHA-256: 89ac299c899332a12f3dc2b687531300d63c06746602fe3c7a294f0f4dae0ed1

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