Malicious PDF — malware analysis report

Static analysis result for SHA-256 896933e16ecdb65d…

MALICIOUS

PDF

68.5 KB Created: 2021-09-26 09:58:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: e11bceae424cdddee7b7e9e49b119e0f SHA-1: 19de8ae45c922decb72bf46f78c04de355748f83 SHA-256: 896933e16ecdb65dafff5491322932d936c03bdaa80fb4c8d82b5402b648180e
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' indicates it likely instructs the user to decrypt a payload, a common tactic for evading gateway security. The numerous embedded URLs, many pointing to disposable domains, suggest a link farm designed to distribute further malicious content or lead to phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://medvor.ru/uplcv?utm_term=space+shooter+game+hack PDF link annotation
    • https://rugsdirect4u.com/uploadedfiles/file/21001138236.pdfIn PDF document text
    • http://mydreamtuscanwedding.com/editor_up/24969707987.pdfIn PDF document text
    • https://big-affaires.com/img/pics/files/luvuwosega.pdfIn PDF document text
    • http://nemalipics.com/milusixotevusefogofobane.pdfIn PDF document text
    • http://neurooperations.com/ckfinder/userfiles/files/42226471281.pdfIn PDF document text
    • http://svadbavmoskve.com/content/xuploadimages/file/nunufufenas.pdfIn PDF document text
    • http://megalaserasia.com/upload///86551064437.pdfIn PDF document text
    • https://bbensonmft.com/wp-content/plugins/super-forms/uploads/php/files/72efc9d6392e0b707ded6bbc0f86ec1e/nenulusadefoximuxefode.pdfIn PDF document text
    • http://lukasikgroup.pl/Image/files/83321465939.pdfIn PDF document text
    • https://tgvl.in/uploads/fck/files/81193444735.pdfIn PDF document text
    • https://yourownadviser.com/ckfinder/userfiles/files/52999031913.pdfIn PDF document text
    • https://satuldelut.ro/ckfinder/userfiles/files/puredefinilomegigor.pdfIn PDF document text
    • https://ver9.sonikgps.com/ckfinder/userfiles/files/83537669304.pdfIn PDF document text
    • https://cosmeticdermatologymiamibeach.com/uploads/data/files/xobawexivop.pdfIn PDF document text
    • https://editionsitaliques.com/userfiles/file/pusakarulikotinid.pdfIn PDF document text
    • http://rafaelokazakov.com/file/tipibiwanuvapipuzud.pdfIn PDF document text
    • https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/16140a7ae4cfc3---86639409763.pdfIn PDF document text
    • http://suvagcentr.ru/userfiles/files/13986913519.pdfIn PDF document text
    • http://guide-eq.com/userfiles/file/20210924095409_vtefg4.pdfIn PDF document text
    • http://cheapmarkt.com/userfiles/file/3471291408.pdfIn PDF document text
    • https://peintures-descours.fr/fichier/files/nusemik.pdfIn PDF document text
    • http://daimarconstrucciones.com/images/admin/file/10036256619.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ac6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAC6E 10744 bytes
SHA-256: b1988095b099a342aaf98281f3f0f4fbcc2f944ed4e933e9357e89687be20f56
font_01_sfnt_off0000c530.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC530 15176 bytes
SHA-256: 6f50ce188e914ffda8704f6b8db69e2a29bf7e2c37433632157272804037e0b6
font_02_sfnt_off0000eb1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB1C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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