Malicious PDF — malware analysis report

Static analysis result for SHA-256 79d2f904e28c6e70…

MALICIOUS

PDF

70.4 KB Created: 2021-09-25 05:51:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 7ec5bfed6a3d2d28b27e22ee9d906ff5 SHA-1: 1ecc74e7b76cec76d86739f75754796e93f3a7a2 SHA-256: 79d2f904e28c6e70ef7901b5688ab144c15b7c863833c8483fd601d61725dd40
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The presence of numerous embedded URLs, many pointing to potentially compromised or suspicious domains, suggests a phishing or malware distribution scheme. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports this, indicating a link farm designed for deceptive purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 https://northcoteplaza.com/userfiles/file/80886756295.pdf In PDF document text
    • https://rivieresoceanie.com/ckfinder/userfiles/files/91688824889.pdfIn PDF document text
    • http://akinmedical.com/uploads/file/95152486942.pdfIn PDF document text
    • http://streetnn.ru/data/upload/ck/files/86290137973.pdfIn PDF document text
    • https://abandassociates.com/ckfinder/userfiles/files/13349286441.pdfIn PDF document text
    • http://alhambra.kopanramen.com/uploads/files/74096128631.pdfIn PDF document text
    • https://www.parquesanalbertohurtado.cl/ckfinder/userfiles/files/vesusajelelepevuja.pdfIn PDF document text
    • https://mebelpozakazu.ru/wp-content/plugins/super-forms/uploads/php/files/04fb1a135e852472cdf8c92385a42df0/pozifibavegilugipivokiso.pdfIn PDF document text
    • https://dorfadvertising.com/ckfinder/userfiles/files/91165135730.pdfIn PDF document text
    • https://pankajplast.com/ckfinder/userfiles/files/65030889078.pdfIn PDF document text
    • https://larsonsvanservice.com/nbloom/fckuploads/file/vidobi.pdfIn PDF document text
    • http://tonioloclaudio.it/userfiles/files/dotesirorure.pdfIn PDF document text
    • http://ylpqzl.com/ckfinder/userfiles/files/44902439506.pdfIn PDF document text
    • http://entrackintl.com/uploads/73088741876.pdfIn PDF document text
    • http://salonorganica.ru/upload/files/32594846901.pdfIn PDF document text
    • http://dolphinegypt.net/userfiles/file/dovav.pdfIn PDF document text
    • http://belgium-ex.com/images/blog/file/91178940653.pdfIn PDF document text
    • http://smartvoicesys.com/userfiles/27970384974.pdfIn PDF document text
    • http://rajhansnursery.com/userfiles/file/nodaxunigofakizesidijiva.pdfIn PDF document text
    • http://bagandpack.ru/wp-content/plugins/super-forms/uploads/php/files/7572ec4625df7c66b83eb87807da7bab/38897960877.pdfIn PDF document text
    • https://aljazeerahdrilling.com/userfiles/files/91430317896.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=super+brawl+universe+mod+apkPDF 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_off0000b099.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB099 11012 bytes
SHA-256: 66e05238b63b476787312bc4474291a2798aca10752aefe8e7d7b219cf53cec1
font_01_sfnt_off0000c9ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9ED 16668 bytes
SHA-256: 6ead229cbf2c89df494b5eabf0b9c9c44936e931dd84541793ff6f6a20547d79
font_02_sfnt_off0000f426.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF426 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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