Malicious PDF — malware analysis report

Static analysis result for SHA-256 6dd7022e188e6a5f…

MALICIOUS

PDF

70.7 KB Created: 2021-09-06 01:07:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 2d1611e6402bdb2b2c79042545f73e79 SHA-1: b933afb3cb651dc24adf9989be2babb732c82737 SHA-256: 6dd7022e188e6a5f14e1650a23850d73cd011ebfa3aef3aedf689453109141c2
216 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF is identified as malicious by ClamAV and ML classifiers, exhibiting characteristics of a phishing lure. It contains numerous links to external URLs, many hosted on compromised CMS platforms, suggesting an attempt to redirect users to malicious sites. The PDF structure and content indicate it's designed to trick users into clicking these links, likely to download further malicious content or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 8

  • 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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 70 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://huntic.ru/uplcv?utm_term=shodhganga+mathematics+project+pdf PDF link annotation
    • https://monacollection.ua/wp-content/plugins/super-forms/uploads/php/files/8b88d6e86ed45a54b8bc0143f3f7ca60/65329059268.pdfIn PDF document text
    • http://denda.co.kr/ckfinder/userfiles/files/28483812879.pdfIn PDF document text
    • http://myconnect-thailand.com/image/upload/File/nowozesopimemulatitexur.pdfIn PDF document text
    • http://ambulatorioveterinarioscapindandrea.it/userfiles/files/vutaxanifisemul.pdfIn PDF document text
    • https://kakvkusno26.ru/wp-content/plugins/super-forms/uploads/php/files/6de9288d2d9df82f3d7b1ba49d9d74b1/65291843921.pdfIn PDF document text
    • https://advancedbusiness.co/wp-content/plugins/super-forms/uploads/php/files/2cfefa87ed3a4a83b92f41d271bb5f1e/wanogijaxetidapuvo.pdfIn PDF document text
    • http://gospel-pour-100-voix.com/fichiers/newsletter/file/66340996688.pdfIn PDF document text
    • https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/161086847c355d---lunevoperalujin.pdfIn PDF document text
    • https://www.unicodesystems.com/wp-content/plugins/super-forms/uploads/php/files/eenrudl1akd7eg428bedptom37/mexabizumonogivurasibum.pdfIn PDF document text
    • https://suemsas.com/wp-content/plugins/super-forms/uploads/php/files/nfddlh6li4v3ed4qe1gkmmtii4/84031944330.pdfIn PDF document text
    • https://portugaliaimagyarok.com/ckfinder/userfiles/files/mitij.pdfIn PDF document text
    • https://valserve.in/web/k/main_admin/ckfinder/userfiles/files/zixarepibaxemutij.pdfIn PDF document text
    • https://blackknowledge.com/wp-content/plugins/super-forms/uploads/php/files/c2f156840a578f1bd2e26169f1f729ec/zumusumaguwok.pdfIn PDF document text
    • http://kfbi.ru/content/file/nogesegoz.pdfIn PDF document text
    • http://www.scmphotography.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160d1a528cc41f---12137985936.pdfIn PDF document text
    • http://paulsaperstein.com/userfiles/files/41493239191.pdfIn PDF document text
    • http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074650a9b7e6---22400472754.pdfIn PDF document text
    • https://brunoamaranti.it/wp-content/plugins/super-forms/uploads/php/files/kmpk5sa8t55qt3u4qi92362g81/mululirebetuxaxotipifatev.pdfIn PDF document text
    • http://pwr-tech.ru/userfiles/file/21428357804.pdfIn PDF document text
    • http://mountmedpharmacy.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607246203164a---bugogekesurexo.pdfIn PDF document text
    • http://bobiniauto.com/userfiles/file/lejerekineral.pdfIn PDF document text
    • https://narimasu-chintai.net/jcfiles/file/41040231061.pdfIn PDF document text
    • http://ana-jsc.com/upload/files/gamofolomiwiwa.pdfIn PDF document text
    • http://yachtandgulet.com/userfiles/file/legugovigoxoju.pdfIn PDF document text
    • https://okazionche.com/files/xafipifudimomuzedize.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_off0000b7aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB7AA 14132 bytes
SHA-256: 9c5d8a7a2450e9fa2b026dee7a03d67c6025f149e1f143cee13f027f9905b84b
font_01_sfnt_off0000da99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA99 11224 bytes
SHA-256: f7b48bba27b2c299b918689817528b356748dd667b104b92c9193d7aa2997cb1
font_02_sfnt_off0000f474.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF474 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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