Malicious PDF — malware analysis report

Static analysis result for SHA-256 484dab3d467638b0…

MALICIOUS

PDF

98.8 KB Created: 2021-09-17 06:05:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: bde8b848ee2a53e0cc930d637f719a53 SHA-1: de61a6ddffb881f5d233dbea5c591819cf420f65 SHA-256: 484dab3d467638b0dc64b10e5f56fa9f9ce65c8ef22f70701d26cfb651ed9be8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, directing users to multiple external URLs, some hosted on compromised CMS uploads. The document body is heavily obfuscated and appears to be generated by wkhtmltopdf, suggesting it's not intended for direct user reading but rather as a container for malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://pnktools-th.org/ckfinder/userfiles/files/58305293825.pdf In PDF document text
    • http://wwpokebar.com/uploads/files/bitufaropunepom.pdfIn PDF document text
    • https://firesystem.ro/imagini_ws/nevarejupimivumitajuxufos.pdfIn PDF document text
    • http://elliptical-trainers.ru/ckfinder/userfiles/files/gozol.pdfIn PDF document text
    • http://elandtour.com/FileData/ckfinder/files/20210917_549CEF8BB1501932.pdfIn PDF document text
    • http://montesantangelo.it/files/files/vufodofob.pdfIn PDF document text
    • https://shriayurvednagpur.org/public/ckfinder/userfiles/files/14928514959.pdfIn PDF document text
    • https://clinicscrm.com/img/files/16698897154.pdfIn PDF document text
    • http://exms.fr/sites/default/files/file/gosuje.pdfIn PDF document text
    • https://www.gsccn.it/wp-content/plugins/formcraft/file-upload/server/content/files/1613beb954ac9a---mebopuwex.pdfIn PDF document text
    • http://pedraferro.com/files/files/runulagodawapevudurofana.pdfIn PDF document text
    • http://artospace.com/pics/file/65785304042.pdfIn PDF document text
    • https://resortweeks.pro/userfiles/file/80199794079.pdfIn PDF document text
    • http://usaoxin.com/userfiles/2021-9/file/16915646562.pdfIn PDF document text
    • https://protectname.xyz/whoisprivacy/userfiles/files/74837423471.pdfIn PDF document text
    • https://myparrotfood.com/user_files/files/59542242192.pdfIn PDF document text
    • http://oris-am.com/editor_up/raforuji.pdfIn PDF document text
    • https://vialivonica.eu/userfiles/files/didaxavevugej.pdfIn PDF document text
    • http://ageddfjtjgrade.pretty-match.com/upload/files/18635654680.pdfIn PDF document text
    • https://truckforceone.eu/upload/editor/file/lamepafibexagaguwuwezugi.pdfIn PDF document text
    • https://yourtuscanyguide.com/wp-content/plugins/super-forms/uploads/php/files/jdp5fa5im45kv3ms3i4m8butj3/tanuzu.pdfIn PDF document text
    • http://jinsonmetal.com/Upload/file/vobesi.pdfIn PDF document text
    • http://alompar.hu/uploads/content_files/files/valetusit.pdfIn PDF document text
    • https://www.azulejositurry.com/wp-content/plugins/super-forms/uploads/php/files/ilfpaifk2dk567v5ufj0sbe5i4/damenirupeko.pdfIn PDF document text
    • http://nofatrans-int.com/userfiles/file/56802792522.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=codex+dark+angels+8th+edition+pdfPDF 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_off000119fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119FB 11212 bytes
SHA-256: 6966e4a24d52c3d5d815a42149c09b127813fb8eab4bfbe1c336b04aa2790a22
font_01_sfnt_off000133f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x133F8 18780 bytes
SHA-256: 7f4a213a0322f918e5a7a55396f31eafd35f36aff838e5beaea38162d1c90d10
font_02_sfnt_off00016526.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16526 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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