Malicious PDF — malware analysis report

Static analysis result for SHA-256 3294085f8e80fe97…

MALICIOUS

PDF

80.4 KB Created: 2021-09-17 09:05:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: d4eebed16d6819342293715bad23fcb6 SHA-1: 4b5a178693dc81df605d3fc8321181663e7806af SHA-256: 3294085f8e80fe97ea3e741eef1065cbf8dde15bd43b536e1a354dc0a2179e70
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many pointing to suspicious domains, and exhibits characteristics of a link farm designed to redirect users. The presence of PDF-specific heuristics like 'PDF_URI' and 'PDF_SEO_DISPOSABLE_LINK_FARM' further supports its role as a lure, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://pokorny-podlahy.cz/UserFiles/File/tozajagemibibisedamidiv.pdf In PDF document text
    • http://westpakusa.com/phpsites/vertical_living/uploads/file/37807855201.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/2632imjkh4dtsk4l1d3u4i3mf6/25058254516.pdfIn PDF document text
    • http://flexinform.com/hirlevel/file/piwiziwabajuvuxuxexagu.pdfIn PDF document text
    • https://sheenabusesandcoaches.com/userfiles/file/84818237318.pdfIn PDF document text
    • https://360clothing.indicsys.com/home/www360cl/public_html/uploads/images/files/mugasimoxojanivewomid.pdfIn PDF document text
    • https://china-glass-mosaic.com/userfiles/files/20210916_093718.pdfIn PDF document text
    • http://ackerviewguesthouse.com/userfiles/file/79050301105.pdfIn PDF document text
    • https://alhurwallpaper.com/Files/files/66516508137.pdfIn PDF document text
    • https://hiroyoung.com/data/files/fumojenodonabu.pdfIn PDF document text
    • http://club-integra.ru/userfiles/file/25648650095.pdfIn PDF document text
    • http://nieruchomosci-swidnica.pl/userfiles/file/xowozoletupubogaguvek.pdfIn PDF document text
    • http://webinaris.eu/ckfinder/userfiles/publics/files/dazepedupibikibofifi.pdfIn PDF document text
    • http://apexnepaltravel.com/userfiles/file/8906158794.pdfIn PDF document text
    • https://viceda.com/userfiles/file/gugoko.pdfIn PDF document text
    • http://tieulongcopro.com/luutru/files/24823626869.pdfIn PDF document text
    • https://santevita-bg.com/ckfinder/userfiles/files/mabiwijojavalarebiwavova.pdfIn PDF document text
    • http://ambvetbrashersclavoghisu.eu/userfiles/files/89398906964.pdfIn PDF document text
    • http://jujucuisine.com/userfiles/file/99179175620.pdfIn PDF document text
    • https://tecnomatec.cl/upload/file/25458050180.pdfIn PDF document text
    • http://objetivovender.com/wp-content/plugins/formcraft/file-upload/server/content/files/161328a6630739---92460494943.pdfIn PDF document text
    • http://alrabbancapital.com/file/files/83236757953.pdfIn PDF document text
    • https://sujatasfoodopolis.com/ckfinder/userfiles/files/siwugovejupopedo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=fishing+clash+apk+unlimitedPDF 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_off0000d674.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD674 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ee8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE8B 10912 bytes
SHA-256: d19ced08accb2859361cdb165bcdfeb207b3ca240049fe2e54e969605d0867ce
font_02_sfnt_off00010764.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10764 17572 bytes
SHA-256: 2bb4196f33e6483117eae6205738b7a6de1d06c838d9dee53b9341006b533a14