Malicious PDF — malware analysis report

Static analysis result for SHA-256 2968703bce6571d7…

MALICIOUS

PDF

77.9 KB Created: 2021-09-13 01:33:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 5852ce1bd11d7aa8ce4808b37b3aac98 SHA-1: 799827c2e75ec33290892410509a616302cf0597 SHA-256: 2968703bce6571d735c9bfd747efb70bce907bb365ac4fb514a4e384355f73f4
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs pointing to a link farm, suggesting a tactic to manipulate search engine results or distribute additional malicious content. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates a pattern of using disposable hosting for link farms, further supporting the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://squarcialupirelaxinchianti.com/writable/public/userfiles/file/zejag.pdf In PDF document text
    • http://cattaneoarchitetti.it/userfiles/files/zoxizetos.pdfIn PDF document text
    • http://champagne-marc-chauvet.com/images/files/13671106458.pdfIn PDF document text
    • http://esipro.fr/userfiles/file/bobobotavanilotuf.pdfIn PDF document text
    • http://rockpapersun.com/upload_mce_image/file/39774173796.pdfIn PDF document text
    • http://ohana1bbq.com/uploads/files/zuvaxetubojaw.pdfIn PDF document text
    • http://www.xzass.org/ckfinder/userfiles/files/rurubevafuliburuvotuxolox.pdfIn PDF document text
    • https://toolsatool.com/userfiles/files/wojudududozix.pdfIn PDF document text
    • http://danchrisjewelry.com/userfiles/file/42142388151.pdfIn PDF document text
    • https://poulinstrapscan.com/userfiles/file/teberadalekilikejop.pdfIn PDF document text
    • http://phutunggiahungoto.com/uploads/files/29308827957.pdfIn PDF document text
    • http://xfswchem.com/upload/files/48040108690.pdfIn PDF document text
    • https://loyallcanada.net/editor_files/file/fipuzoxu.pdfIn PDF document text
    • https://bhavanarayanaswamy.org/userfiles/file/35153474567.pdfIn PDF document text
    • http://amindoost.ir/images/upload/files/39721936816.pdfIn PDF document text
    • http://alt-1c.ru/userfiles/file/61611016500.pdfIn PDF document text
    • http://vhz.cz/user-files/82067231295.pdfIn PDF document text
    • https://www.etbsupplies.com/wp-content/plugins/formcraft/file-upload/server/content/files/161364ab6c7a4f---nofupaxetibowu.pdfIn PDF document text
    • https://ikuseikyokai.jp/ckmedia/files/7010164941.pdfIn PDF document text
    • http://bhttourist.com/upload/fckimagesfile/tipafomenutu.pdfIn PDF document text
    • https://cauthinh.com/luutru/files/45136056595.pdfIn PDF document text
    • https://censcakmu.org/board/file/files/499887627.pdfIn PDF document text
    • http://rothemtour.com/FileData/ckfinder/files/20210912_9CAB737DAC02772B.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=drag+racing+ios+hackPDF 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_off0000cec7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEC7 17176 bytes
SHA-256: 07e60378a859318ddbb2acd9705575820fd11e037213f449123c440202074b32
font_01_sfnt_off0000fac5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAC5 10324 bytes
SHA-256: 585a9982fc7b7fd7edd0ae443e8e714568ef4fe48d9595617378c08bd6982488
font_02_sfnt_off000111f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111F7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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