Malicious PDF — malware analysis report

Static analysis result for SHA-256 e47528c420e453da…

MALICIOUS

PDF

82.9 KB Created: 2021-09-03 10:57:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 8c0a2d03ff6bdb987d4e9f85a15ba6c2 SHA-1: d014e6c071c3c64cd459fd19e4f71b747a71319e SHA-256: e47528c420e453da6a8bbf67e21ac2433c46481c82bd3197a7726182dba24340
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier. It functions as a link farm, with numerous URLs pointing to compromised WordPress upload directories and disposable hosting. The primary purpose appears to be redirecting users to potentially harmful content, consistent with phishing or malware distribution tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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 https://asiaviews.org/wp-content/plugins/super-forms/uploads/php/files/q8qlomqboalausig830nij41l0/tipavuwowofuzeloxogogaxo.pdf
    • http://automsystem.com/UploadFile/file/20210522231840816.pdf
    • https://aronabritcan.com/userfiles/file/pajanidixofaputetutiro.pdf
    • http://sts-logistika.ru/wp-content/plugins/super-forms/uploads/php/files/8f5181f69dafa058eee63c142eed2ebc/mitekanevit.pdf
    • http://richmediahouse.com/admin/uploads/file/72473673463.pdf
    • http://yaqeen-eg.com/userfiles/file/kemelazuwapudarafu.pdf
    • https://www.hemoroidklinigi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c6912f19f3---sebageboxiguvadonej.pdf
    • https://www.verpoort-bouw.be/wp-content/plugins/formcraft/file-upload/server/content/files/160964c6287d31---xukadelawufuguse.pdf
    • https://postelezmasivu-olomouc.cz/ckfinder/userfiles/files/7089510069.pdf
    • https://veterinarycarefoundation.org/userfiles/file/14232131136.pdf
    • https://baxsporthorses.com/userfiles/file/buxuxilujagugide.pdf
    • https://foursservices.com/nbloom/fckuploads/file/49273761002.pdf
    • http://heldermusic.nl/ckfinder/userfiles/files/70427409879.pdf
    • https://goldenparadisestsimons.com/wp-content/plugins/super-forms/uploads/php/files/b48186b4426aac590622632b0f3cfc14/23786042548.pdf
    • https://ludifrance.fr/userfiles/file/8427683078.pdf
    • http://europeanprofservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078a6796c62a---80713875116.pdf
    • http://bjzjygj.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/58358078310.pdf
    • https://www.revistadefiesta.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608cfc45f0c35---tezefojesorire.pdf
    • http://galeriejacqueselbaz.com/userfiles/file/fojezaro.pdf
    • http://foodchemsino.com/d/files/84525393359.pdf
    • https://www.hinogas.com/wp-content/plugins/super-forms/uploads/php/files/v5f9u3prf5pnhhvs3ec8tbea7c/47066748920.pdf
    • http://7166867.ru/ckfinder/userfiles/files/zulapodaligaxijopol.pdf
    • http://stopasbestos.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160b16e45355fc---724301230.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=thailand+arrival+card+pdf
    • 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_off0000e242.bin
35dc08e56500fba3244e59717117f3744ec3a04f9f7b749a4e4b96e2eeb63419
pdf-font-stream PDF embedded font (sfnt) at offset 0xE242 10228 bytes
font_01_sfnt_off0000f90b.bin
d31da30798ba8de580412889cd18b2ee9df358bf8932eee017e6d888eba57535
pdf-font-stream PDF embedded font (sfnt) at offset 0xF90B 17344 bytes
font_02_sfnt_off0001269a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1269A 16792 bytes