Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e2c48d9576c701e…

MALICIOUS

PDF

68.6 KB Created: 2021-09-21 02:10:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 8f2e86a111b24d9740ffda9589ab082e SHA-1: 42a28e759e7dbbbf373c19b5099a4811ba649564 SHA-256: 5e2c48d9576c701e781ec08c247946710b1f47bf65c8ce9f9fdb949a77728432
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF is identified as a phishing lure due to its small size and image-heavy content, typical of a screenshot used to hide clickable links. The heuristic PDF_IMAGE_LURE and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the presence of numerous external URIs suggests the document is designed to redirect users to malicious sites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9916

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
  • 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 68 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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 http://prosefkuchare.cz/userfiles/polijejebu.pdf In PDF document text
    • https://fiscconsulting.com/userfiles/file/73239353744.pdfIn PDF document text
    • https://ganport.pl/userfiles/file/zobovagowutoj.pdfIn PDF document text
    • https://mattress-leader.com/media/juvaworajuwinufivisowofa.pdfIn PDF document text
    • https://www.pal-kont.hu/wp-content/plugins/super-forms/uploads/php/files/77c3992d2e90c59b3e50a9d33fcd7844/duvaga.pdfIn PDF document text
    • http://lexprikson.com/admin/style/images/userfiles/file/39787742088.pdfIn PDF document text
    • http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ed589ea643---34096708339.pdfIn PDF document text
    • https://www.colegiumaniucarei.ro/ckfinder/userfiles/files/86259552483.pdfIn PDF document text
    • https://repetitorebi.ge/userfiles/files/dogonofeniv.pdfIn PDF document text
    • http://rogersdesignhouse.com/uploads/files/lanevotufewipafugabiwib.pdfIn PDF document text
    • http://think6.net/ckfinder/userfiles/files/20210914101214.pdfIn PDF document text
    • http://biznesfishki.ru/files/userfiles/files/nofiregefarexobup.pdfIn PDF document text
    • https://buka.ru/sadm_files/8077345872.pdfIn PDF document text
    • http://ipceurope.be/assets/file/51997439869.pdfIn PDF document text
    • https://oykufestivali.com/ckfinder/userfiles/files/65903231740.pdfIn PDF document text
    • http://gowowdeli.com/uploads/files/5827965075.pdfIn PDF document text
    • http://yey.uw52.com/upload/files/solulopamidilis.pdfIn PDF document text
    • https://sadex.pl/fck/file/27945682493.pdfIn PDF document text
    • http://btfa.tw/upload/files/63832327566.pdfIn PDF document text
    • http://bikipvuikhoedep.com/app/webroot/files/editor_upload/files/1731847988.pdfIn PDF document text
    • https://munis-roquesalbes.cat/demo/vilalba/imatges/file/fuwafotelenubik.pdfIn PDF document text
    • https://mi-stores.com/basketballtotaal/images/editor/file/fedamoza.pdfIn PDF document text
    • http://maytinhnangdong.com/files/uploads/editor/files/24799619281.pdfIn PDF document text
    • http://xn--franzsischebulldoggen-lec.eu/userfiles/file/botagodimugunedunor.pdfIn PDF document text
    • https://hotelexpert.ro/uploads/files/34142593497.pdfIn PDF document text
    • http://irinaburmistrova.ru/files/fidadep.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=iso+for+ppssppPDF 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_off0000b535.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB535 14024 bytes
SHA-256: a11fb1f9fb79559954d8d1045a156323da0b95deb31076c8c4409f75cbeec01c
font_01_sfnt_off0000d7b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7B7 9668 bytes
SHA-256: 89a4350ad50d167a5852b7fdb705af2d0266e5a83267ba55ad5e04a8c3b83240
font_02_sfnt_off0000ecc9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECC9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1