Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae6e6309863052cf…

MALICIOUS

PDF

77.9 KB Created: 2021-06-10 21:06:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 05d7385078751e59c228176a94f11ab3 SHA-1: 5aa2c29a7c89fe39c3ee022180e9bd9e188dcd4b SHA-256: ae6e6309863052cf3079359088e03bd640503f2bb06a7440c70258ccccee7edc
156 Risk Score

Malware Insights

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

This PDF file is classified as malicious by ML and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, directing users to download game-related ISO files from compromised WordPress sites. The presence of multiple external URIs and the use of disposable hosting suggest an attempt to distribute malware or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 https://philabc.ru/uplcv?utm_term=minecraft+for+psp+iso+file+download
    • https://www.sgestrecho.es/wp-content/plugins/formcraft/file-upload/server/content/files/160b9c0c90d734---44254896429.pdf
    • https://teenvolunteerhouston.com/wp-content/plugins/super-forms/uploads/php/files/5925e477f7796ae4da9580f3c375d2a0/45852670090.pdf
    • http://hillcountryawningsandsunscreens.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a23f1a6a36---58852523744.pdf
    • https://advance-pack.com/editor_upload/file/51415614710.pdf
    • https://higher-reason.com/wp-content/plugins/super-forms/uploads/php/files/pfiita1k0eleqon33meav9134r/83799337737.pdf
    • https://alrashed-alsaleh.com/userfiles/files/48634061875.pdf
    • https://www.plsok.com/wp-content/plugins/super-forms/uploads/php/files/f283df96945402deca096b39919ba480/38677579963.pdf
    • http://kennyre.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e83d04fe70---metamupurumiri.pdf
    • http://es-umzuege-transporte.de/wp-content/plugins/super-forms/uploads/php/files/9412d2db051014f380f12e027c6cbe83/67945853530.pdf
    • https://www.avenueroadadvertising.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e5f30c7e1e---24950020876.pdf
    • https://www.rockfallco.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606da2e3ba2fa---xaxakilukuni.pdf
    • https://wpsqld.com.au/wp-content/plugins/super-forms/uploads/php/files/765b570433b4004651611dc37e2b6736/15126612804.pdf
    • https://www.tai.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160a1ade1447c4---rumakekazilaxizerugow.pdf
    • http://habitat3.eu/userfiles/files/35678496467.pdf
    • https://mandalaconfeccao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606fd63f6de6f---lolixererevenosadinajame.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e99c.bin
6bdf61b8e52d4ae3db27869d0c09ea836baef3a47ade880d0a278e4467633ad4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE99C 5244 bytes
font_01_sfnt_off0000fb9c.bin
dc13baba3862eb866a6b2daf3b06c1b9f3d35b6db4cdb1824c6c8e979738cdee		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFB9C 21320 bytes

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