Malicious PDF — malware analysis report

Static analysis result for SHA-256 1605a8dd07b0c466…

MALICIOUS

PDF

64.1 KB Created: 2021-09-16 05:15:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 4fb6e4be6ed075b657b601c88ff3f04c SHA-1: 768561e16bdaadb0bd6d3fcc795da51a79cf6fad SHA-256: 1605a8dd07b0c46636b6a5ec16ce3c75acee333a024b6a0b713aed877b50016b
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs pointing to external domains, suggesting it functions as a link farm or phishing lure. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' specifically identifies the document's structure as a non-clustered link farm on disposable hosting, reinforcing the phishing or malware distribution attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6960

Heuristics 4

  • 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
  • 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://coretry.ru/uplcv?utm_term=dead+space+phone+game PDF link annotation
    • http://househouse.it/userfiles/files/36769123503.pdfIn PDF document text
    • http://permagnet.com/upload_files/file/21091119065199498597dmkg.pdfIn PDF document text
    • http://arcdesantmarti.com/biocop/Images/images-editor/file/70936161994.pdfIn PDF document text
    • http://hitmet.slektenkaas.com/bilder/file/xuvoruzegor.pdfIn PDF document text
    • https://weekendtripskolkata.com/userfiles/file/mabiririnetokimirife.pdfIn PDF document text
    • http://eastindiaspray.com/suvra/eastindia_spray/files/54174723002.pdfIn PDF document text
    • http://rungrawin-itt.com/userfiles/files/38771274980.pdfIn PDF document text
    • https://www.verimevzabavu.cz/ckfinder/userfiles/files/95753688397.pdfIn PDF document text
    • https://discovercefalu.it/_data/images/file/gulizogavuvigufoteloxer.pdfIn PDF document text
    • http://jcbcharpentebois.com/ressource/site-image/files/41997731295.pdfIn PDF document text
    • http://studiotecnicolari.it/userfiles/files/67448639200.pdfIn PDF document text
    • http://igs.compcierge-asia.com/ckfinder/userfiles/files/xiselebipo.pdfIn PDF document text
    • http://artwatch.ru/userfiles/file/zukavenopuzowamibi.pdfIn PDF document text
    • http://de-ko-gmbh.com/ckfinder/userfiles/files/64294113411.pdfIn PDF document text
    • http://veszpremlizards.hu/_user/file/32597326268.pdfIn PDF document text
    • http://gostium.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612fc146ccc45---49267759673.pdfIn PDF document text
    • http://luchetti.it/userfiles/files/zamopida.pdfIn PDF document text
    • https://phr4u.com/files/vulipigutedafunabutital.pdfIn PDF document text
    • https://pernambucoimortal.com/imagens/files/nejor.pdfIn PDF document text
    • http://kingspec.su/wp-content/plugins/super-forms/uploads/php/files/o60857hske3au15tmqdte3sac0/77642441007.pdfIn PDF document text
    • https://scavilecis.it/userfiles/file/66266755893.pdfIn PDF document text
    • http://hakanhurdacilik.com/userfiles/file/zitopukezolojijoribew.pdfIn PDF document text
    • https://emotionalgift.com/ckfinder/userfiles/files/pekoxikeraxitijap.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 5

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e534.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE534 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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