Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbc526bacd03fcf2…

MALICIOUS

PDF

68.3 KB Created: 2021-09-24 23:01:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 325c3475669e794da991f6639401810c SHA-1: 0556dd1eca94293b0a01b39e818d1bb84063d797 SHA-256: bbc526bacd03fcf2c886b8b19cca8cb5dae854086fe493417c28029cf75c8016
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF exhibits characteristics of a phishing lure, including being image-heavy with a clickable action trigger and containing numerous external URLs. The presence of multiple disposable links on potentially untrusted hosting further supports this. Although no scripts were explicitly extracted, the PDF structure and heuristic firings suggest it is designed to redirect users to malicious sites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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 https://nomylo.ru/uplcv?utm_term=eternal+ii+mm2+value PDF link annotation
    • http://gr-chem.com/upload/files/95275894001.pdfIn PDF document text
    • https://loyallcanada.ca/editor_files/file/35782615960.pdfIn PDF document text
    • http://k2plusinterior.com/userfiles/74507134863.pdfIn PDF document text
    • http://www.hermosabeachbungalows.com/userfiles/files/koluwelozudotorosuxudetov.pdfIn PDF document text
    • http://gesundezellen.de/neu/userfiles/file/toxikapazosubulijanevaji.pdfIn PDF document text
    • http://www.fotografoeventimilano.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140e32a0cb0d---ruzetuzafa.pdfIn PDF document text
    • http://madmojo.com/fckupload/file/napeputifi.pdfIn PDF document text
    • http://schroniskoorzechowce.pl/ckfinder/userfiles/files/36652536459.pdfIn PDF document text
    • http://bachova-terapia.sk/images/file/68424188884.pdfIn PDF document text
    • https://bio86.net/userfiles/fichiers/zagowepadinapom.pdfIn PDF document text
    • http://nadafashionbelt.com/Uploads/file/4346078375.pdfIn PDF document text
    • http://aid-calais.com/userfiles/file/93532098810.pdfIn PDF document text
    • http://chromavials.com/d/files/ritafoduwelisofe.pdfIn PDF document text
    • http://recko.ru/ckfinder/userfiles/files/59840635163.pdfIn PDF document text
    • http://bighost.vn/uploads/userfiles/file/5938710747.pdfIn PDF document text
    • http://kasintorn.com/images/upload/files/47965098088.pdfIn PDF document text
    • https://pbchistoryonline.org/uploads/file/lubadikulixif.pdfIn PDF document text
    • https://snabavto.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614b678855fba---3601884721.pdfIn PDF document text
    • http://scuolascifondocortinadolomiti.it/userfiles/files/90645731240.pdfIn PDF document text
    • http://hertzlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/40037977696.pdfIn PDF document text
    • http://mgrima.com/files/file/66285831682.pdfIn PDF document text
    • http://vizit-k.net/uploads/editor/files/pebonobediditeki.pdfIn PDF document text
    • http://poiskvod.ru/images/file/nabubimalojaxu.pdfIn PDF document text
    • http://stensoproject.com/userfiles/files/98734757634.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_off0000b0d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB0D3 14096 bytes
SHA-256: bc4ffaa3e56343b01fabfc94cd2c623af5ffc46228bdc64bcd6978df0c34cb26
font_01_sfnt_off0000d440.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD440 10252 bytes
SHA-256: 5901ec7c1c00d1263941dd365c9ad291812ea94cd177b8c3e3298a90c2a66940
font_02_sfnt_off0000eb41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB41 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1