Malicious PDF — malware analysis report

Static analysis result for SHA-256 80c140f319025a40…

MALICIOUS

PDF

86.0 KB Created: 2021-09-09 08:55:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: a22fb9d1d95810b3733972e3a35e5742 SHA-1: 9ec715cfd37f86bd14d8769c22435a0d03d64f36 SHA-256: 80c140f319025a4091fec1e835b4568fa0409f881e2b7255cf7c5887643aff2e
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with heuristics indicating it functions as a link farm on disposable hosting. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. No scripts were extracted, and the document body was unreadable binary data.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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 https://archism.ru/uplcv?utm_term=cheat+engine+like+app+android PDF link annotation
    • https://soudurelauziere.ca/upload/editor/file/40586540761.pdfIn PDF document text
    • https://mehfermobilsaglik.com/userfiles/file/47160770345.pdfIn PDF document text
    • http://secureyun.cn/uploadfile/file///2021090308235416.pdfIn PDF document text
    • https://heks-tech.com/app/webroot/userfiles/files/92286269028.pdfIn PDF document text
    • http://ambvetbrashersclavoghisu.eu/userfiles/files/xosibusubif.pdfIn PDF document text
    • https://delphin-bau.com/ckfinder/upload/files/kokawefav.pdfIn PDF document text
    • http://xz-brand.com/ckfinder/userfiles/files/morixafuj.pdfIn PDF document text
    • http://dade666.com/userfiles/202109file/2021090908010770554.pdfIn PDF document text
    • http://ytlcases.com/userfiles/file/16375345936.pdfIn PDF document text
    • http://biblioteka-belzec.pl/upload/files/23786486331.pdfIn PDF document text
    • https://rougezenekar.hu/files/file/towutudadi.pdfIn PDF document text
    • http://ne-moloko.ee/wp-content/plugins/super-forms/uploads/php/files/ede608961d4b726d3bab9806fa8c98b4/jevolevupuz.pdfIn PDF document text
    • http://dydlhx.com/upfiles/file///6648863201.pdfIn PDF document text
    • https://justbuymeds.net/userfiles/file/52003616183.pdfIn PDF document text
    • http://garant-fond.ru/ckeditor/ckfinder/userfiles/Images/files/60184568194.pdfIn PDF document text
    • http://elfast.ru/userfiles/file/88894999766.pdfIn PDF document text
    • http://grandfiltr.com/files/file/11119463068.pdfIn PDF document text
    • https://5udua.com/contents/files/67108022584.pdfIn PDF document text
    • https://8foro.exceltur.org/exceltur_nuevo/ckfinder/userfiles/files/43429688077.pdfIn PDF document text
    • http://mebel-moscow.com/content/xuploadimages/file/noxadeb.pdfIn PDF document text
    • http://philipp-haberland.de/images/upload/file/kusetaxijejimagiwufa.pdfIn PDF document text
    • https://agronlogistics.com/userfiles/files/74933360517.pdfIn PDF document text
    • http://cieplej.pl/imgturysta/file/pusari.pdfIn PDF document text
    • http://atel-j.nl/uploads/files/punoxuwap.pdfIn PDF document text
    • http://angelcabrera.com/FCKfiles/file/3702741473.pdfIn PDF document text
    • 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_off0000ecda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECDA 17532 bytes
SHA-256: 47d8eb9288aabf5594654a6284f03f6ccd9a2b2a76a32fb1cb56528c27f6633c
font_01_sfnt_off00011a70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A70 10628 bytes
SHA-256: 7062c6b3fd61e7e9b49dc5dbecc7a8c9dc92067596a4125c8ff9d121156b0843
font_02_sfnt_off00013274.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13274 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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