Malicious PDF — malware analysis report

Static analysis result for SHA-256 01704869808b01c4…

MALICIOUS

PDF

72.8 KB Created: 2021-10-05 07:54:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 1f0455ca5886704382aae11b98b0597e SHA-1: 059d6ceaf70c13224430a9344950619d2bb764f7 SHA-256: 01704869808b01c4afa631464b3aa2929c6dc8eb7367bfb54be40d7d41fa24f1
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by ML and ClamAV as malicious, with heuristics indicating it's a link farm on disposable hosting. While no scripts were extracted, the presence of numerous embedded URLs, many pointing to PDF files on potentially compromised or unrelated domains, suggests a phishing or malware distribution attempt. The document body is heavily obfuscated and appears to contain metadata rather than user-readable content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9940

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://tantusmarina.com/UserFiles/file/xuzoxiwibefabimu.pdf In PDF document text
    • https://dianthusindustrial.com/resimler/files/redijewizirebometudapi.pdfIn PDF document text
    • http://collectifff.be/imgdb/accueil/files/80979091320.pdfIn PDF document text
    • http://thuannam.com/image/files/fowugijuvesudirevef.pdfIn PDF document text
    • http://thanhnienxp.com/vietkiendo/upload/file/sekuvatexinorideki.pdfIn PDF document text
    • http://safeabortionnepal.com/userfiles/file/18363251631.pdfIn PDF document text
    • http://ivepe-elearning.gr/assets/UserFiles/mainHome/file/famowabipes.pdfIn PDF document text
    • http://studiogalata.it/userfiles/files/serimivigiwogatipore.pdfIn PDF document text
    • http://fslawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/patulo.pdfIn PDF document text
    • http://vinmexindia.com/uploads/verakenujuv.pdfIn PDF document text
    • http://scandirent-new.ru/uploads/assets/file/83046649313.pdfIn PDF document text
    • https://www.shopveriamici.com/wp-content/plugins/super-forms/uploads/php/files/135dmq6jucnqd5q8h4u6ia0eim/buvagevaganogiduxuxisar.pdfIn PDF document text
    • http://iranjobex.com/cache/fck_files/file/folurewefabo.pdfIn PDF document text
    • http://le-nora.com/userfiles/file/tifukarirusef.pdfIn PDF document text
    • https://samsungdvm.net/upload/ckfinder/files/pufefan.pdfIn PDF document text
    • http://lerucherdesanges.fr/userfiles/file/72005496739.pdfIn PDF document text
    • http://germainelecocq.it/userfiles/files/20793536757.pdfIn PDF document text
    • https://tepihtrava.rs/files/63150048809.pdfIn PDF document text
    • https://www.auto-ecole-acm.com/ckfinder/userfiles/files/wuxibadozixiwoxijekebaf.pdfIn PDF document text
    • https://www.gurgy.net/ckfinder/userfiles/files/rokulavog.pdfIn PDF document text
    • http://balade-pierry.fr/userfiles/file/zuworixa.pdfIn PDF document text
    • http://yourhealthyanswer.com/ckfinder/userfiles/files/suworebamedosuwuke.pdfIn PDF document text
    • http://cjpharmtech.com/upload/files/sexiwer.pdfIn PDF document text
    • http://ez-surveying.com/htdocs/cljr/data/files/vutozakefese.pdfIn PDF document text
    • http://hoya-system.com/uploads/files/202109211157004007.pdfIn PDF document text
    • http://iscyber.com/userfiles/files/bigojojurefalup.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=how+to+see+instagram+posts+of+privatePDF 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_off0000b9f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB9F4 16428 bytes
SHA-256: a58a30dcdb0e0ab534598a25fcbba847976019c292d2d7e4bb9e896577cb3418
font_01_sfnt_off0000e427.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE427 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fc3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC3E 10796 bytes
SHA-256: e41af8f3d09719fd34becb21ed70704f13d81ae6596435351e195673dd810e81