Malicious PDF — malware analysis report

Static analysis result for SHA-256 94e44597fc3a3133…

MALICIOUS

PDF

87.2 KB Created: 2021-06-27 01:11:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 17f6628d3e491fc4238048618b61d102 SHA-1: 5b279ecfdc7de0744b86ef04b191bed20240df08 SHA-256: 94e44597fc3a313373a43417547bbe81ee9ff7cdaf9835b72e206a5b6cc065ac
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or trojan threat. Heuristics reveal it functions as a link farm, with numerous embedded URLs pointing to compromised or disposable hosting sites. These links are likely intended to lure users to malicious websites for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://harekatmemuru.com/images/Media/files/82142792976.pdf
    • https://digireg.cz/upload/xuwiketuro.pdf
    • https://menlopark.com/wysiwygfiles/file/26277350485.pdf
    • http://aucoindeshalles.com/menu/file/27575737812.pdf
    • http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609c6e0e24197---7698423287.pdf
    • http://associacaoguainumbi.org.br/wp/wp-content/plugins/formcraft/file-upload/server/content/files/1608beb92d2b4b---nutinanisopo.pdf
    • http://henri-ruch.ch/doc_pub/file/diwugozefogezi.pdf
    • https://abandassociates.com/ckfinder/userfiles/files/37598190579.pdf
    • https://master.plus/wp-content/plugins/super-forms/uploads/php/files/8185897d458c70ccc2882894ae04fd70/xasijigixumewovug.pdf
    • http://skyline1968.com/clients/74864/File/17106853794.pdf
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606e2ae25b909---60919737734.pdf
    • http://budohurtsa.pl/userfiles/file/posebibojemazugizibaroz.pdf
    • https://ladychief.com/wp-content/plugins/super-forms/uploads/php/files/14e355c8b25f03c668a0d1d05ffd01b8/zazebavizexojedalo.pdf
    • https://sandalyecenneti.com/wp-content/plugins/super-forms/uploads/php/files/3heqqb0cmrrit2m3ohg5mtssf4/tubevis.pdf
    • https://www.shopveriamici.com/wp-content/plugins/super-forms/uploads/php/files/v5rfm39781enjmrc60u4chqaf9/jawolomodoxogikuxopaxe.pdf
    • http://www.sport-konyv.hu/userfiles/file/xaxivu.pdf
    • http://sport-way.ru/img/file/37741437197.pdf
    • https://portsidestrategies.com/wp-content/plugins/super-forms/uploads/php/files/7ac6a42eb2d6dfb9a0451a7bad1d07c2/58529211500.pdf
    • https://yssnewlessons.org/UserFilesTwo/file/19247699948.pdf
    • http://botosani.ro/img/uploads/file/bibopevokudunuruwebe.pdf
    • https://ipcare.nl/wp-content/plugins/super-forms/uploads/php/files/g7u2t4l4bd5q0fb1rm3r5r81nn/dobunoki.pdf
    • http://www.maarsehoveniers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1606f3cdc3a8a4---fufedibupatufepidesuse.pdf
    • http://seyrimerdin.com/userfiles/file/92901566759.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=best+live+streaming+football
    • 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_off0000f1a6.bin
200a76f31c551369e0e99a233d22e36bcaac7ce0fc4384e25e0b0e1fadb9d6f7
pdf-font-stream PDF embedded font (sfnt) at offset 0xF1A6 17152 bytes
font_01_sfnt_off00011e4b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11E4B 16792 bytes
font_02_sfnt_off00013662.bin
9053a9bc22d82d7fbe641a8a041aa586b9c323d74843a719aaf764c117232ba6
pdf-font-stream PDF embedded font (sfnt) at offset 0x13662 10816 bytes