Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f5251f66e7b37ef…

MALICIOUS

PDF

83.2 KB Created: 2021-09-17 08:18:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b30c988b13dd4e60735243df2bc742f3 SHA-1: 1f7599ab3bde17556468d048c717bc3968e53c7e SHA-256: 2f5251f66e7b37ef56de5a573cdfccbdec9beef5c300cc6b526cd666b18b5a4b
126 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which point to suspicious PDF files hosted on various domains, indicating a link farm designed to redirect users. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly suggests this is a tactic to obscure malicious destinations. No scripts were extracted, but the overall structure and URL distribution point towards a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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 http://leap-egypt.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135a4a541c08---dasubokemegokorufo.pdf
    • https://irantruck.ir/data/file/pokikunenifolod.pdf
    • http://kawana.tech/userfiles/file/wemejavapepo.pdf
    • https://www.sblending.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16132ee0a8a24f---65701231667.pdf
    • https://artofsurfing.com/preview/ckfinder/userfiles/files/sepunabenedazuda.pdf
    • https://shiksha24.com/userfiles/files/xesopubusiwo.pdf
    • http://splogservice.ru/content/file/ruzorovatumewekevazixul.pdf
    • https://xn--z4qq44i.tw/upload/actfiles/32119064978.pdf
    • https://editionsitaliques.com/userfiles/file/rewonagon.pdf
    • http://mentor-tutor.com/newGroserLikeProject/uploads/files/40087900931.pdf
    • http://i-akparat.kz/ckfinder/userfiles/files/naranivuwatoveku.pdf
    • http://www.siposferenc.hu/html/3421606164.pdf
    • http://djpress.pl/Image/files/wakide.pdf
    • http://norilsk.torbay.ru/images/uploads/file/xugasimebinuna.pdf
    • https://costabravas.com/uploads/localidades/files/71591964775.pdf
    • https://hanoihome.net/img_duhoc/files/56088230955.pdf
    • https://educationindiajournal.org/ckfinder/userfiles/files/98714881604.pdf
    • https://junona.manyel.website/images/uploads/medium/45646620569.pdf
    • https://moderator.lt/components/com_mijoshop/opencart/image/data/files/2784327009.pdf
    • http://xn--h1agcmh.com/ckfinder/userfiles/files/65225539862.pdf
    • http://micronforgacsolo.hu/UserFiles/file/levowoxeduregebi.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=call+recordings+of+my+phone
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000df6f.bin
4bed877d01a065ba0c61b9bf3b55b77d3592acc747404a8fb051628f46a27678		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDF6F 11112 bytes
font_01_sfnt_off0000f8ec.bin
e24131723865a96d77002eb272575b3aafe1fac75276dcee40ee439ce87b73b4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF8EC 17768 bytes
font_02_sfnt_off00012727.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12727 16792 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.