Malicious PDF — malware analysis report

Static analysis result for SHA-256 0cc8d2fa14c49de1…

MALICIOUS

PDF

116.4 KB Created: 2021-07-31 22:34:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: ac72f89545b0e25cddc949f62b0acd01 SHA-1: 45c2fc13d8be25d089cff6183412c54ede8a78a0 SHA-256: 0cc8d2fa14c49de1419eefd4131756436b8a1db069cd6700c1ffea2ef0ce0ebd
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ClamAV and an ML classifier. It contains numerous embedded URLs, many of which point to compromised WordPress sites acting as link farms. The presence of these links suggests an attempt to redirect users to malicious destinations, likely for phishing or malware distribution. No scripts were extracted, but the overall structure and URL distribution indicate a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://eyestech.in/wp-content/plugins/super-forms/uploads/php/files/iv4nbjs484n3kbd46mofp8dfb0/tatigazodujabazaxowuzoz.pdf In PDF document text
    • http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fe10c15264---86368335754.pdfIn PDF document text
    • https://www.surajinformatics.com/wp-content/plugins/super-forms/uploads/php/files/a6db03ecb5b8b6d5650b5452dd58dfe3/dadusojuwirinotobajexun.pdfIn PDF document text
    • http://losmarinoslanzarote.com/marinarubicon/admin/file/85549570038.pdfIn PDF document text
    • http://labotinnghia.com/img/files/60834495603.pdfIn PDF document text
    • http://bagandpack.ru/wp-content/plugins/super-forms/uploads/php/files/90440b1bcd91be317eb4981df0d212b3/bujusexuwap.pdfIn PDF document text
    • https://saraelv.no/wp-content/plugins/formcraft/file-upload/server/content/files/16073b1fe136e4---vugederewobito.pdfIn PDF document text
    • http://clair-environnement.eu/catalogue_dynamique/file/nojuzorazovixalegijuluwa.pdfIn PDF document text
    • https://barrierball.cl/ckfinder/userfiles/files/337453896.pdfIn PDF document text
    • https://anpheatingandac.com/nbloom/fckuploads/file/42964095914.pdfIn PDF document text
    • http://www.iso-clean.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160c8d5e5a5ba7---4255681950.pdfIn PDF document text
    • http://1careglobal.com/upload/files/89534440264.pdfIn PDF document text
    • http://banghaija.com/userfiles/file/mawagijizokosin.pdfIn PDF document text
    • http://riskhedgetech.com/uploaded/file/114168945060bc116483f17.pdfIn PDF document text
    • https://aguiapromocional.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160afb2ca7e9db---50912279157.pdfIn PDF document text
    • https://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/16085e96662d14---61948819292.pdfIn PDF document text
    • https://gearforfree.com/wp-content/plugins/super-forms/uploads/php/files/hu6bhhb3jg95le9frrulcdoe4r/vulifoto.pdfIn PDF document text
    • http://pronobile.de/catalog/file/44177243845.pdfIn PDF document text
    • http://chicagohalo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d9f088726ee---xojegojifanasafe.pdfIn PDF document text
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8353368afe---dobore.pdfIn PDF document text
    • https://louvre.lv/res/wysiwyg/file/32283819137.pdfIn PDF document text
    • http://oreade-breche.fr/userfiles/file/pokiwovap.pdfIn PDF document text
    • https://www.euroservicemilano.it/wp-content/plugins/formcraft/file-upload/server/content/files/160962541d15e8---2062325697.pdfIn PDF document text
    • http://babamoleskine.com/files/file/woxej.pdfIn PDF document text
    • http://alexlunacoach.com/img/editor/file/25424885599.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=sanskrit+grammar+pdf+in+gujaratiPDF 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_off00015d63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15D63 22108 bytes
SHA-256: 2b0e5b0d2e60ed46239e8fc41304ae380b765d40e613253da6f3c5ea205fd792
font_01_sfnt_off00019292.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19292 10940 bytes
SHA-256: 0ef4e233a2599a3d7d978d40cab852f2977942fe3bc536c8136158a6714cf681
font_02_sfnt_off0001abad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1ABAD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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