Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae5f329073470119…

MALICIOUS

PDF

86.5 KB Created: 2021-06-29 04:04:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 2ffefc205bbdf67167f4a9aa924c77a5 SHA-1: bf1ccc4177281ada68bc115fe47da769061b638f SHA-256: ae5f3290734701192fb65f0e56d0b720d2146a94cf10306f885d3a602845ca8f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or malware distribution attempt. It contains numerous links to compromised WordPress upload directories and disposable hosting, suggesting it functions as a link farm to redirect users to malicious content. The presence of external URIs and link farms points towards an attempt to lure users to external sites, likely for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://irlanc.ru/uplcv?utm_term=can+we+see+private+account+photos+on+instagram
    • https://transcendenceit.com/wp-content/plugins/super-forms/uploads/php/files/10738cf985e1ab8264f0312aa1ce07c6/17168757151.pdf
    • http://www.skup.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a150264c3ac---rosexusumomedafusak.pdf
    • http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/160951ed47894a---kojoxipefuga.pdf
    • http://pocatellocampfire.com/wp-content/plugins/super-forms/uploads/php/files/ke7l64s5e7an1pfomql77jf8qk/30265766638.pdf
    • http://esoftland.com/userfiles/file/48909490483.pdf
    • http://mirembeestate.co.ug/wp-content/plugins/formcraft/file-upload/server/content/files/160bd9e5b80e3f---tevizud.pdf
    • http://shmountaineering.co.uk/wp-content/plugins/super-forms/uploads/php/files/jnqe389n602m3lmb384vcddsp7/fotafipobugulozife.pdf
    • http://bensonlandscape.com/editorData/file/gorikokupawi.pdf
    • http://www.hypnotiseur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608266f4442f0---4469815143.pdf
    • http://kwik-it.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16072e0c51250a---sagelajazanazifaxatuwasu.pdf
    • https://www.northernillumination.com/wp-content/plugins/super-forms/uploads/php/files/d8a20ef606876bfb2f182e3ab44d83d5/92981656851.pdf
    • http://www.veronicaneal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/1609885733000e---70640794610.pdf
    • http://c2mag.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0ceadd3da0---jolabonelixikedogapumul.pdf
    • http://baovephuongtroi.com/vietkiendo/upload/file/nosedaminuvugadi.pdf
    • http://www.qookspot.kitchen/wp-content/plugins/formcraft/file-upload/server/content/files/160812d34a7f13---98197970640.pdf
    • http://apricomm.com/userData/board/file/zawesosofajik.pdf
    • https://sellerflows.com/wp-content/plugins/super-forms/uploads/php/files/477476f0b66de35c4d7254f1867a6e99/ganorukaxe.pdf
    • http://endustriyelkiralama.com/wp-content/plugins/super-forms/uploads/php/files/n530aa1egjonav759njbk3mu0h/47714972627.pdf
    • http://www.stratcareerservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0fc197e3bc---ninobika.pdf
    • http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c434458e47e---nidopasijo.pdf
    • http://agiusfuneraldirectors.com/files/file/55370054996.pdf
    • http://www.dadosefatos.net.br/wp-content/plugins/formcraft/file-upload/server/content/files/16088602b911c2---desot.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_off0000ebfd.bin
0a09ab6d0e6fe5a969e9a44e56d4bb415ee84667c09b1f7a39c407e2f373c5c2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEBFD 17988 bytes
font_01_sfnt_off00011af6.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11AF6 16792 bytes
font_02_sfnt_off0001330d.bin
1eff79aeb7098d1d5baf92a92d45d1249cc2775c5ae44c388b0129db396cd58c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1330D 11056 bytes

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