Malicious PDF — malware analysis report

Static analysis result for SHA-256 fdddefb9b6633e6f…

MALICIOUS

PDF

71.5 KB Created: 2021-09-11 06:05:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 6159aa67bd0be42f0be086f0a4308d66 SHA-1: fb1113344a0a36cf8360b953ceb13dcf6ac68d64 SHA-256: fdddefb9b6633e6f74031237a463939f2f639f56258b6c363b81e9054dfb587e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, directing users to compromised WordPress upload storage and other disposable hosting sites. The embedded URLs, such as 'https://wastran.ru/uplcv?utm_term=legally+blonde+2+full+movie', are likely used to redirect users to malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9909

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://wastran.ru/uplcv?utm_term=legally+blonde+2+full+movie PDF link annotation
    • http://aotwcasino.com/ckfinder/userfiles/files/71437839051.pdfIn PDF document text
    • http://karmakonnect.org/DrumiBhatt/karmakonnect.org/Final/ckeditorimage/files/46564070750.pdfIn PDF document text
    • http://ankaraeksioglu.com/resimler/files/1400561674.pdfIn PDF document text
    • https://www.taxiserviceh24.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139b6513b16d---xakapuwapibusirekum.pdfIn PDF document text
    • https://thebillionbottom.com/business_school/uploads/file/nupusofun.pdfIn PDF document text
    • http://www.commandinglife.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137e5e0216c6---62841785542.pdfIn PDF document text
    • https://sammycar.ch/sammy/sites/default/sammyfiles/newsletterfile/matuzunim.pdfIn PDF document text
    • http://metall-press.ru/files/pumum.pdfIn PDF document text
    • http://f-okinawa.com/img/tmp/file/56496410506.pdfIn PDF document text
    • https://webhostmurah.com/wp-content/plugins/formcraft/file-upload/server/content/files/161314768b0c51---15191723872.pdfIn PDF document text
    • http://wolfpackbasketballacademy.com/content_docs/mebojutezigikogurusuzivug.pdfIn PDF document text
    • http://papaicountrylodge-longstay.com/user_img/files/tafozafetejuduv.pdfIn PDF document text
    • http://rootbeadmill.com/upload_fck/file/2021-9-6/20210906121136120697.pdfIn PDF document text
    • http://moneymaker-gold.de/files/79718807022.pdfIn PDF document text
    • https://ssvacancy.com/ckfinder/userfiles/files/32197052604.pdfIn PDF document text
    • http://trongtinpc.com/luutru/files/nowerefogolamuguz.pdfIn PDF document text
    • http://karate-talence.com/newsite/userfiles/files/pisubafajesuseduduf.pdfIn PDF document text
    • http://gucaoyun.com/uploads/file/030953337569.pdfIn PDF document text
    • https://mercedesmazo.es/wp-content/plugins/formcraft/file-upload/server/content/files/1613be7b60df5a---rejoselisorus.pdfIn PDF document text
    • http://sushinamu.com/uploads/files/pevavatizokoluwom.pdfIn PDF document text
    • https://doktor-ara.com/userfiles/files/44099262471.pdfIn PDF document text
    • http://orderbestwings.com/uploads/files/tenoniperolazone.pdfIn PDF document text
    • https://conrays.ru/f/data/78880360036.pdfIn PDF document text
    • https://tommytest.dish1314.com/data/html_editor/files/27905731489.pdfIn PDF document text
    • http://www.tokyomagic.jp/images/library/File/69288881157.pdfIn PDF document text
    • http://metafelix.it/userfiles/files/pebululomo.pdfIn PDF document text
    • http://area100impianti.it/userfiles/files/9463738860.pdfIn PDF document text
    • https://kachhiproperties.com/wp-content/plugins/super-forms/uploads/php/files/6108033a7b241902552bcf7f05b664ea/98192750909.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_off0000b7cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB7CF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cfe1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFE1 15372 bytes
SHA-256: b984f267813adfd40463cc9ca73e8f1fafd733b12f57cb5d8ca138c93e0c6b19
font_02_sfnt_off0000f6fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6FC 10828 bytes
SHA-256: 0b80201503072af9ba1076133be7bf2e52ca997bad1a4eb87194b98cd004bcf9