Malicious PDF — malware analysis report

Static analysis result for SHA-256 c30b5900c47ca185…

MALICIOUS

PDF

86.6 KB Created: 2021-07-23 19:42:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 0648348794fbbe01e4870a3fdf0a22db SHA-1: c3a8a0348c4dc243cabe4d71d58ade800154a562 SHA-256: c30b5900c47ca18557c02a16385792dabc77550ccc6ef2c7363e6100361612cc
156 Risk Score

Malware Insights

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

This PDF was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains a link farm pointing to numerous compromised WordPress uploads and other disposable hosting sites, suggesting an attempt to redirect users to malicious content. The file's structure and numerous external links indicate it's designed to exploit user trust by directing them to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://glass-haus.ru/wp-content/plugins/super-forms/uploads/php/files/4fc0c2c265aa7a05a6b0f93c2acfcca2/81097652892.pdf
    • http://jinistudy.com/_UploadFile/Images/file/86965447718.pdf
    • https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/1609b5cfadf1e2---12677034656.pdf
    • https://maility.pl_adresuserfiles/file/62046310254.pdf
    • http://highlandcougars83.com/clients/2/26/268573c5102cd00412bac87cee9346ec/File/74485770105.pdf
    • https://robertmatzuzi-massagetherapist.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160774f33be25a---40318648020.pdf
    • https://zlatartopalovic.rs//files/59683500786.pdf
    • https://transmar.biz/ckfinder/userfiles/files/muxusixekamun.pdf
    • https://www.mysmilestudios.com/wp-content/plugins/super-forms/uploads/php/files/b3d7f3e83e4f20ca9c75ee5a62618ed5/jitaxogasufapit.pdf
    • https://iamluno.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6a260d96f5---76707099958.pdf
    • http://dmn.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160bbbe49a7ea4---totunep.pdf
    • https://englewoodgrassfarm.com/wp-content/plugins/super-forms/uploads/php/files/a3d04f2e7e26d038eee2c7dd9a410c76/8272125637.pdf
    • https://pristineleather.com/userfiles/file/papil.pdf
    • http://lovellreunion.com/clients/4/42/420738e4954c29d3cfd02fdb1bc9139f/File/21381537321.pdf
    • http://helloshoppingnepal.com/userfiles/file/65193968363.pdf
    • http://www.majorisinvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a8900cab904---59343599568.pdf
    • http://closehorses.com/userfiles/file/26844805150.pdf
    • http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fa5f1a99e87---78876254937.pdf
    • http://lbs.ac.at/wp-content/plugins/super-forms/uploads/php/files/f71k5jqc1agcgqmb9ptilg7tsu/mazedojojujajobozerome.pdf
    • https://alnahamgroup.com/userfiles/file/kokeganexuv.pdf
    • https://smartcrm.cloud/upload/files/muridise.pdf
    • http://fortlauderdalelimorental.net/wp-content/plugins/formcraft/file-upload/server/content/files/160d67d484e0d4---pujonovoruboxifet.pdf
    • https://wurstfargo.com/wp-content/plugins/super-forms/uploads/php/files/0b9d05791ad869063fbc567e25214926/wefubunujabaj.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=ejemplo+de+como+hacer+una+monografia+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_off0000edcc.bin
a323a55217b06f7505429d4a16c7ba1de5a046948b61a32c7b49c6393c9a3315
pdf-font-stream PDF embedded font (sfnt) at offset 0xEDCC 17400 bytes
font_01_sfnt_off000119cf.bin
b3209b0350016b6e990747ae610d2e7321b2314f67460fdca5faec5a8757c407
pdf-font-stream PDF embedded font (sfnt) at offset 0x119CF 11012 bytes
font_02_sfnt_off000132dc.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x132DC 16792 bytes