Malicious PDF — malware analysis report

Static analysis result for SHA-256 58dbdc561cb79603…

MALICIOUS

PDF

85.5 KB Created: 2021-09-10 10:08:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 983b3d377eeba2c041b79cea787d2392 SHA-1: c7effe9cfeeeacb1f2aaab0848072a288b6c981d SHA-256: 58dbdc561cb7960311b644efa251bf1451e4082a175c7d0c45484fdb01cc5578
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF 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 numerous distinct domains, many of which host PDF files. This suggests an attempt to distribute malicious content or conduct phishing through a network of compromised or disposable websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://tepihtrava.rs/files/47171653715.pdf In PDF document text
    • http://wijnhuis-vaessen.nl/site/data/ws/files/82168248980.pdfIn PDF document text
    • http://amunt.madteam.net/ckfinder/userfiles/files/27409146697.pdfIn PDF document text
    • http://npcbalkan.net/ckeditor/ckfinder/userfiles/files/88127740036.pdfIn PDF document text
    • http://rdmsrl.it/userfiles/files/rabovoderogi.pdfIn PDF document text
    • http://www.miamiairportlimo.net/wp-content/plugins/formcraft/file-upload/server/content/files/16131cfa024c0d---fepijofuxanat.pdfIn PDF document text
    • https://quangcaomattroi.com/uploads/news_file/84958703624.pdfIn PDF document text
    • https://acconpriti.com/ckfinder/userfiles/files/tapemovaj.pdfIn PDF document text
    • http://fishtech.org/uploads/userfiles/file/file/fewumugetebibano.pdfIn PDF document text
    • https://www.gullyracing.it/admin/ckfinder/userfiles/files/67845244431.pdfIn PDF document text
    • http://9262895.ru/ckfinder/userfiles/files/18330414998.pdfIn PDF document text
    • https://fitnessrev.net/wp-content/plugins/super-forms/uploads/php/files/15bgejkm1dvh2k2l99mi7rco4j/32705508230.pdfIn PDF document text
    • http://turskazka.ru/ckfinder/userfiles/files/93436320965.pdfIn PDF document text
    • http://makaroma.fr/upload/file/35327535546.pdfIn PDF document text
    • http://ginzaramen.us/uploads/files/14475393085.pdfIn PDF document text
    • https://arabadvertise.com/userfiles/files/kafuwalelomufatesori.pdfIn PDF document text
    • http://laconchigliacasevacanze.it/userfiles/files/20566918330.pdfIn PDF document text
    • http://tonyprins.nl/images/uploads/file/rosixuduzaku.pdfIn PDF document text
    • http://sushinamu.com/uploads/files/nogomakukukeli.pdfIn PDF document text
    • http://roycraft.ca/userfiles/file/76995084744.pdfIn PDF document text
    • http://gldbirdgel.com/user_img/files/26867188917.pdfIn PDF document text
    • http://xn--80aer5aza.xn---42-5cdakyymnnb9ake1az.xn--p1ai/ckfinder/userfiles/files/vabazudowimepi.pdfIn PDF document text
    • http://retrievers.su/ckfinder/userfiles/files/pitezero.pdfIn PDF document text
    • http://tpokebar.com/uploads/files/82600619509.pdfIn PDF document text
    • http://nsk-nalogov.net/upload/files/81535919732.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=unnecessary+apps+on+androidPDF 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_off0000ec32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC32 17180 bytes
SHA-256: c24a0f69790cf4bbed7fc10fdc05fd262cf7ab12c7188599cbd712eb11b48836
font_01_sfnt_off00011898.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11898 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000130af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130AF 10484 bytes
SHA-256: c870400c39ec02281a89ec3fd37b57bc904d3113c282c1b7d2ce877da0da9bd5

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