Malicious PDF — malware analysis report

Static analysis result for SHA-256 3fbad494ce001c41…

MALICIOUS

PDF

74.5 KB Created: 2021-07-02 15:03:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e32dbc2868758feb0f65e9f025ca186f SHA-1: d63f4de780ab2ff925962b3bb91518f27517296b SHA-256: 3fbad494ce001c413a9dd9c73e0ccf36372b32f512a669505578830ee4ec15ec
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a high-confidence ML classifier and ClamAV detection. It contains numerous links pointing to compromised websites and disposable hosting, suggesting a link farm designed to redirect users. The presence of embedded URLs and the nature of the heuristics indicate a phishing or malware distribution attempt, likely initiated via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://www.northernillumination.com/wp-content/plugins/super-forms/uploads/php/files/68d1b7d078137dd4eef94b4840a8e7af/dolisorofoloborewe.pdf
    • http://botosani.ro/img/uploads/file/13337710228.pdf
    • http://alemotta.com/resources/original/file/diwuxoramafin.pdf
    • http://thegioioto.store/upload/files/23436214557.pdf
    • http://slowjamsundays.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa9f1351346---32643342501.pdf
    • https://lostsoulsmemorialnj.org/wp-content/plugins/super-forms/uploads/php/files/2ebce86de5e175b7a7e490ce9be0717d/bidalexen.pdf
    • http://www.peopleoftheheath.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cdebf7e9e92---zuwisapuserajewetu.pdf
    • https://unitedcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609885a415541---97720259525.pdf
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/ed89b617eee077c2eacd0003f6c4b9b9/kukijevuvoti.pdf
    • https://thejinglelab.com/wp-content/plugins/super-forms/uploads/php/files/q12nlamo7c47h1r87ifv163m4c/riwuz.pdf
    • http://novichiha.ru/pic/file/97210930980.pdf
    • http://moveisgarciadigital.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b01083c1a5f---giwujomuralejepam.pdf
    • https://imagebuzz.net/ckfinder/userfiles/files/kefupanuritemobutubimi.pdf
    • http://ypdtools.com/ckfinder/images_store/files/74587136140.pdf
    • http://www.ashtralmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4eef12fd49---68164922941.pdf
    • http://diysmart.net/userfiles/file/69404069409.pdf
    • http://usaoxin.com/userfiles/2021-5/file/nosenefev.pdf
    • http://acecaalcoy.com/userfiles/file/44083317273.pdf
    • http://www.anclupnapoli.it/userfiles/file/nilirus.pdf
    • http://benhvienlaptop.biz/userfiles/file/76404752323.pdf
    • https://fmpride.com/wp-content/plugins/super-forms/uploads/php/files/1a53ebfe5ff5532ea476cf022a212887/5369874094.pdf
    • http://paykaaluminiya.ru/ckfinder/userfiles/files/mesopaxozubuxodotugutexe.pdf
    • http://beijingxinzhi.com/userfiles/file/20210627021334_870236057.pdf
    • http://rgn2u.com/userfiles/files/raselorenaga.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=victor+cosplay+corpse+bride
    • 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_off0000be79.bin
e4df1d70d82b667b784411fd95ebc02e78ee36227958e00b5e13eda655d1c9ab
pdf-font-stream PDF embedded font (sfnt) at offset 0xBE79 17348 bytes
font_01_sfnt_off0000eacc.bin
46fd3def4e8c60764b2e640c041f999d7a1e7d55833d41f859579f20b2ae4851
pdf-font-stream PDF embedded font (sfnt) at offset 0xEACC 10628 bytes
font_02_sfnt_off0001030f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1030F 16792 bytes