Malicious PDF — malware analysis report

Static analysis result for SHA-256 61f248d9641e076d…

MALICIOUS

PDF

69.3 KB Created: 2021-09-10 21:53:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: f7385cf3752514e1f2262a7b6f4b12e7 SHA-1: b04405af9a251b5dac47041dd0677761406da3b0 SHA-256: 61f248d9641e076d910c4108b389cf3ad48dad56a1328f454d8833bfee6c3007
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to disposable domains, indicating a link farm or redirection scheme. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware delivery. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with attempts to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://finproekt-msk.ru/userfiles/file/nekupusivetobu.pdf In PDF document text
    • http://brkvinc.com/userfiles/file/vakukosemituworutesujezom.pdfIn PDF document text
    • http://dmn.ca/wp-content/plugins/formcraft/file-upload/server/content/files/161313aebeff9c---10717263503.pdfIn PDF document text
    • http://seowonbattery.com/files/fckeditor/file/865750219613b9b17cdc81.pdfIn PDF document text
    • https://floresdeserrezuela.com/aym_image/files/51371564504.pdfIn PDF document text
    • http://cn-junsheng.com/upload/file///202195101535660.pdfIn PDF document text
    • https://angkortaxiservice.com/userfiles/file/xalirawu.pdfIn PDF document text
    • http://www.binghan.my/userfiles/file/73579358395.pdfIn PDF document text
    • https://lederstuhlshop.de/ckfinder/userfiles/files/50554542126.pdfIn PDF document text
    • https://yptea.com/data/fckeditor/files/ranurimemigubonaxu.pdfIn PDF document text
    • http://villaroyalenews.com/userimages/47156337759.pdfIn PDF document text
    • https://mobile-translator.eu/app/webroot/media/files/kewewukuzelepos.pdfIn PDF document text
    • https://dongphuchuytai.com/upload/files/webobikopofaz.pdfIn PDF document text
    • https://incense888.com/uploads/files/202109092025172109.pdfIn PDF document text
    • http://xn--42-6kcdlkbomh7beggito5p.xn--p1ai/userfiles/file/37561897177.pdfIn PDF document text
    • http://equipociclistaugeraga.com/ciclistas/userfiles/file/83486704994.pdfIn PDF document text
    • https://rallstarawards.us/nbloom/fckuploads/file/86628472733.pdfIn PDF document text
    • http://thessalonikiflights.com/files/files/60241337934.pdfIn PDF document text
    • http://express-service-auto.fr/ckeditor/ckfinder/userfiles/files/bidarabuduwiwuzize.pdfIn PDF document text
    • https://0924055971.com/uploads/files/202109072023502916.pdfIn PDF document text
    • http://hcbarrett.com/user_area/file/71538851421.pdfIn PDF document text
    • https://redac.ch/upload/52850430534.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=anti+wifi+hacker+appPDF 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_off0000af26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF26 10400 bytes
SHA-256: 7b035986bb9b4d02cb2edf958edc96e3802e3cf1b59e0534ab98b6ad2eb4be71
font_01_sfnt_off0000c6bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6BC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000dece.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDECE 16680 bytes
SHA-256: a9d55db96b2ad6b42c489974cbc2b8b5058fb0fa3c2897354c13392f5591db02

Open this report in the interactive analyzer, or submit your own file for analysis.