Malicious PDF — malware analysis report

Static analysis result for SHA-256 08399352c3883746…

MALICIOUS

PDF

92.6 KB Created: 2021-07-04 08:59:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 0b3d20fa49551750669da13150a38e29 SHA-1: aa502689ec1e6adacd095ea3365c7977ba0c124e SHA-256: 08399352c38837469f5ed593feaa59982d171f0e89dc9e6b5731a3bed3d79281
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, with many embedded URLs pointing to compromised websites or disposable hosting. This suggests the document is likely used to lure victims to malicious sites for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://karimeh.com/public/userfiles/file/tebajebujozekipufewu.pdf
    • https://howardsteeves.com/wp-content/plugins/super-forms/uploads/php/files/fec906c08d957d402cdb481a29d647ea/84343920245.pdf
    • http://simonide.org/userfiles/file/13721326703.pdf
    • https://baileyelectrical.services/wp-content/plugins/super-forms/uploads/php/files/qv9re3l8ukqm84vkh0hfu7joh9/nikabunawapidozizu.pdf
    • https://dacoma.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160c0f4342e5b4---52969193448.pdf
    • https://www.d-table.com/wp-content/plugins/super-forms/uploads/php/files/3c9949c05a5cb77157fef32115ce57a8/75403695477.pdf
    • https://bdaudit.ro/userfiles/file/50433364525.pdf
    • http://ehomeforeclosure.org/images/file/53186944711.pdf
    • http://www.socalgreatwhite.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073c07a13365---77848013459.pdf
    • https://autoschiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b1d7e9592d6---83452428825.pdf
    • http://auxerretv.com/content/public/file/66075419551.pdf
    • http://vibrosystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160b152fd734e8---fafosajuzikuruj.pdf
    • https://www.booster-p.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607031652581f---26352369272.pdf
    • https://feltshoe.com/userfiles/file/pamuma.pdf
    • https://theemperorsoldclothes.co.uk/wp-content/plugins/super-forms/uploads/php/files/h4o3qevlcmmtcuvbddvauet4n3/10514975408.pdf
    • http://candientushinko.com/images/file/50722393506.pdf
    • https://www.infrascale.com/wp-content/plugins/super-forms/uploads/php/files/987e90b25019d6c23f56ace93632558f/77014726243.pdf
    • http://juha.be/_files/file/49916510481.pdf
    • https://free-spirit-city.eu/uploads/wysiwyg/files/86499689007.pdf
    • http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c217e596886---27536739849.pdf
    • https://pharma-tools.eu/galeria/file/bonasisoxokidinoxolet.pdf
    • https://www.waterlooarmsnewforest.co.uk/wp-content/plugins/super-forms/uploads/php/files/b240d5b9894a89c5d1ac5c4779a9c22d/jafolejapiboseliruraxuxi.pdf
    • https://charqueadaboavista.com.br/wp-content/plugins/super-forms/uploads/php/files/6c2552b028f2b3b4cfc5a52591ea3740/kagumogu.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=the+geocentric+theory+states+that+the+center+of+the+universe+is
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000106a4.bin
a2b821527a42002d97de9c5c290f01399f4c3cced13ffa7182da85dfa5152a15
pdf-font-stream PDF embedded font (sfnt) at offset 0x106A4 10812 bytes
font_01_sfnt_off00011f9b.bin
803a7c5985730f4c95652f35a1bb8c716e6a44dc4ad227e43eb76c6f360491ad
pdf-font-stream PDF embedded font (sfnt) at offset 0x11F9B 16728 bytes
font_02_sfnt_off00014aa2.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x14AA2 16792 bytes