Malicious PDF — malware analysis report

Static analysis result for SHA-256 68709de287a49de6…

MALICIOUS

PDF

84.3 KB Created: 2021-09-03 08:25:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 26aa799da33dac0e37fffb9cf45c7086 SHA-1: dabb8216f68b00e2575a9f7ec5f693af505ca1a4 SHA-256: 68709de287a49de6e728b0148ec14f08fc4eb4efd4f579cd759404d210943847
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious. It functions as a link farm, containing numerous URLs that point to other PDF files hosted on various websites, some of which are compromised. The presence of these links suggests an attempt to direct users to malicious content, likely for phishing or malware distribution. No scripts were extracted, but the overall structure and URL patterns are indicative of a malicious campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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://pima-alarms.rs/slicice/file/nezum.pdf In PDF document text
    • https://everywheregenes.com/uploadfile/qu26_qu106_com/files/81771207366.pdfIn PDF document text
    • https://globalazeri.az/wp-content/plugins/super-forms/uploads/php/files/bj8ufe1tuacaeamlohhi598a26/97287131478.pdfIn PDF document text
    • https://santchavarabed.in/ckfinder/userfiles/files/tovofarelo.pdfIn PDF document text
    • https://fullgame.hu/uploads/files/vobewikifovugarik.pdfIn PDF document text
    • http://www.etoiles-recrutement.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081c46b7752f---86975608431.pdfIn PDF document text
    • https://ccaquebec.com/userupload/files/63143547822.pdfIn PDF document text
    • https://perfecthospital.net/ckfinder/userfiles/files/karubemuvodipizuviruf.pdfIn PDF document text
    • https://fitnessrev.net/wp-content/plugins/super-forms/uploads/php/files/uqolhsnv1mtqbp2tegnkchsqcv/14288785138.pdfIn PDF document text
    • https://visaonline-vn.com/wp-content/plugins/super-forms/uploads/php/files/sh9iqu54kvhvm4etdoeuco869j/tanaxukilapevanigosusa.pdfIn PDF document text
    • http://dangkyidol.com/wp-content/plugins/super-forms/uploads/php/files/laipadnrbhnkue0l8333p8caoa/pizaxiwuvarajup.pdfIn PDF document text
    • https://www.endthestigmacounselling.com/wp-content/plugins/super-forms/uploads/php/files/ug69f28q6osf14ac3sa5pqrbdt/kubegotowiw.pdfIn PDF document text
    • http://pkynfe.net/userfiles/file/dorivetiraranusegimiluj.pdfIn PDF document text
    • http://www.hkwebdesign.com.hk/wp-content/plugins/formcraft/file-upload/server/content/files/160a847d2edc83---nixururew.pdfIn PDF document text
    • https://watertorens.nl/userfiles/file/lusabijizumidigijomop.pdfIn PDF document text
    • https://gearforfree.com/wp-content/plugins/super-forms/uploads/php/files/o8b0mhij15j4lc18g69ne7grs8/jimakevunomigiwamiwuj.pdfIn PDF document text
    • http://iact2001.com/userData/board/file/pirozunufovabolitavegebeb.pdfIn PDF document text
    • https://suemsas.com/wp-content/plugins/super-forms/uploads/php/files/vqovv7gsdr1dl0d73kltgh5uj7/gugemugewipow.pdfIn PDF document text
    • https://sipsib.ru/wp-content/plugins/super-forms/uploads/php/files/0b8bbad04149e1714af5cb79390c6640/kuwulepumivasi.pdfIn PDF document text
    • http://argra.rs/wp-content/plugins/formcraft/file-upload/server/content/files/160a86c979fe38---teregex.pdfIn PDF document text
    • https://isosklo.cz./uploads/kupevulepebasimurudope.pdfIn PDF document text
    • https://coloreverything.love/wp-content/plugins/super-forms/uploads/php/files/592db9526769c76ae1ba26c9d7fa8639/13472318601.pdfIn PDF document text
    • https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609bd4496691c---46286108313.pdfIn PDF document text
    • http://sportschoolindex.nl/images/uploads/papifanakuwiniwiwarazego.pdfIn PDF document text
    • http://hoinhikhoavn.com/img/files/zasatotomodupebutaforug.pdfIn PDF document text
    • https://iominneapolis.com/wp-content/plugins/super-forms/uploads/php/files/b37cf7bb0ed13a3400b2f37d6fe5ccad/xinosozi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=infix+pdf+editor+pro+7.1+6+crack+%26+patchPDF link annotation
    • 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_off0000e362.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE362 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fb79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB79 10880 bytes
SHA-256: f48f79c01a8efb9c6d562f698c17ed21bb6df9cd46709402373e3960f665eadc
font_02_sfnt_off000114d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114D4 17708 bytes
SHA-256: 3653d66c4b0add04a2abdcb5bfc9b9982e0e22e1fd751ae0a4dde2863b27bd9c

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