Malicious PDF — malware analysis report

Static analysis result for SHA-256 e48d50acc3dc504f…

MALICIOUS

PDF

77.4 KB Created: 2021-03-27 23:46:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 972debd36f89bee53d1a3c5781eeae55 SHA-1: 36dc9dbabee6ca9395d8ae0dc929025eef7f3d73 SHA-256: e48d50acc3dc504f4c67cf73e909a31bf3a97497d0e2ed2f323049fe092b5981
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 0.9997

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 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.
  • 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://dugedepap.ru/aws?utm_term=best+bluetooth+keyboard+ipad+pro PDF link annotation
    • https://puzagejezazi.weebly.com/uploads/1/3/4/4/134465952/ligovobosanut.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472783/normal_603a88edba50d.pdfIn PDF document text
    • https://cdn.sqhk.co/pibutuvopedu/rjjgj1x/strategic_human_resource_management_notes_for_mba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450504/normal_60317dcb79b92.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374976/normal_5fd5f3e798035.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420745/normal_600b603e504b5.pdfIn PDF document text
    • https://cdn.sqhk.co/zoluwumenad/gkzkigT/musumuludasubepuwe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4467589/normal_5fcccbae4b98f.pdfIn PDF document text
    • https://cdn.sqhk.co/madufuxenuw/ifvhdlE/akreditasi_ban_pt_unpad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496582/normal_5fd12b1279bbd.pdfIn PDF document text
    • https://cdn.sqhk.co/tepobugu/MhiifzO/play_hearts_online_free_yahoo.pdfIn PDF document text
    • https://cdn.sqhk.co/jepivitixiwo/hiljbc5/egg_chair_loveseat.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447641/normal_5fd61360c70dd.pdfIn PDF document text
    • https://zunodeni.weebly.com/uploads/1/3/1/0/131070331/nipotifusujuwoj.pdfIn PDF document text
    • https://cdn.sqhk.co/nejisakatok/fgeifwv/big_notorious_music_greatest_hits.pdfIn PDF document text
    • https://cdn.sqhk.co/xororofomed/gggj7jc/freeze_dried_food_machine_prices.pdfIn PDF document text
    • https://cdn.sqhk.co/dutararopat/jgUMYhe/inventioneers_game_download.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460981/normal_5ff41b3912a85.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vokamaluxofom.epizy.com/30643896016.pdfIn PDF document text
    • http://pasazaxara.rf.gd/kizudavisusosulep.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_off0000f11a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF11A 5404 bytes
SHA-256: 53d43d90a2199ffd1e6606b702abbe399a119d03f9265c5400fb7bd6b70a4893
font_01_sfnt_off00010373.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10373 10892 bytes
SHA-256: 5b263a8246312648cdf10be7d136a9cd17d81eca92cf97542b94d4c327faca29

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