Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1b0a11b79f4896c…

MALICIOUS

PDF

86.8 KB Created: 2021-07-01 21:31:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ae31d56f8d613c3c44fdaa127eaadd61 SHA-1: b4f995c01929b7852d88ccb40691efcb053b0d73 SHA-256: d1b0a11b79f4896c6d71628367c194d2acab778f12572ed0f059e2339bc722ff
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains numerous links to external websites, many of which appear to be compromised WordPress installations or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the overall structure indicate an attempt to trick users into downloading further malware or engaging in phishing activities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://philabc.ru/uplcv?utm_term=ghost+recon+breakpoint+pc+game+free+download
    • https://torrentclub.vip/wp-content/plugins/super-forms/uploads/php/files/mqs1a5lafq45v7ht8o171p7eij/wifewijebelodujeba.pdf
    • http://xn--49s538bo8ux8c.net/userfiles/file/49575290731.pdf
    • http://www.iamgoingto1996.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609833108ab24---nowumexakogagudara.pdf
    • https://gccpay.net/wp-content/plugins/super-forms/uploads/php/files/bc319cda971ed6e24a9da63a6302cfd9/94517047560.pdf
    • https://istanbularicilikfestivali.com/upload/ckfinder/files/23213548037.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a634461bead---xixukugisuxuvusumibis.pdf
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/1607586b8ad14a---71183677075.pdf
    • http://xn--e1aazeoc7d.xn--p1ai/images/shared/file/31210441870.pdf
    • http://feach.ie/images/uploads/file/25403810967.pdf
    • https://aimtronu.org/userfiles/file/57720932903.pdf
    • http://mai-colle.jp/userfiles/file/24958997366.pdf
    • http://ontheedgeofnow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160754ebd157d3---69781900150.pdf
    • http://www.wallisandemmanuel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b88a112fe3c---ligaditoras.pdf
    • https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160715d8be5cd4---pakemokabofopabe.pdf
    • https://www.elementstraining.co.uk/wp-content/plugins/super-forms/uploads/php/files/1t68sqfmuf3q1o6svattsl7rf5/63517174886.pdf
    • http://duonglaohanoi.com/userfiles/file/tilimewekowawubigo.pdf
    • http://krindustria.com.br/site/wp-content/plugins/formcraft/file-upload/server/content/files/1609278664ce45---jililav.pdf
    • https://sambelteri.com/contents//files/fuxiperixoxoduta.pdf
    • http://aircond.md/upload_fck/file/kerugelanodi.pdf
    • https://smilepath.com.au/wp-content/plugins/super-forms/uploads/php/files/0febabce1aabc7c05eb728311350cff5/24569974253.pdf
    • https://hotelritariccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/160bd5b4d9e9ab---58927308559.pdf
    • http://beiwendq.com//data/attachment/file/81878313282.pdf
    • http://marthomaiticherukole.com/userfiles/file/texivawogimekudube.pdf
    • https://comfortinnbarrie.com/phpsites/vertical_living/uploads/file/zumebunabajogezasase.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_off0000ecf2.bin
10acb84414c832c6f812071f635bb43a3d4f6e3ac8eeec97afce2f77b3c442e5
pdf-font-stream PDF embedded font (sfnt) at offset 0xECF2 17120 bytes
font_01_sfnt_off00011995.bin
ea408778328c94b7337e12c38e1fdd54bfa64e2ff3f407d8d82ed684321098a8
pdf-font-stream PDF embedded font (sfnt) at offset 0x11995 11424 bytes
font_02_sfnt_off0001340d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1340D 16792 bytes