Malicious PDF — malware analysis report

Static analysis result for SHA-256 58eb6e086aaf8251…

MALICIOUS

PDF

68.7 KB Created: 2021-09-10 03:56:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-23
MD5: 5552d76af39573816f8ad19c7ffda20c SHA-1: 2d20720f2c797ca07a9b0bdbb305377f1bec06c6 SHA-256: 58eb6e086aaf8251ef9b19c18935cb7f74b95812eb836f6c0c4f78489025d572
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and contains embedded JavaScript. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 6

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://drafthe.ru/uplcv?utm_term=gta+v+cheats+pc PDF link annotation
    • http://kompletucetnictvi.cz/files/file/zatujoxofololobesanu.pdfIn PDF document text
    • https://reparation-mobile.net/userfiles/file/pipigesesimakijojoxolu.pdfIn PDF document text
    • http://ztkammer.at/uploads/file/47521708172.pdfIn PDF document text
    • http://happyhanool.com/ckupload/files/2057877930.pdfIn PDF document text
    • https://tsolisp.com/files/file/27379459924.pdfIn PDF document text
    • https://enville.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613347065b156---pixukudevekujunewijid.pdfIn PDF document text
    • https://getracemirates.com/userfiles/files/88238123847.pdfIn PDF document text
    • https://ctners.com/ckfinder/userfiles/files/lazod.pdfIn PDF document text
    • http://brixtontaxi.com/survey/userfiles/files/26869964209.pdfIn PDF document text
    • https://socialacademy.gr/wp-content/plugins/super-forms/uploads/php/files/c4ab1d0008ddbe210fdee9381210f992/mulutogupobifekikej.pdfIn PDF document text
    • http://ceresasrl.it/userfiles/files/43595303127.pdfIn PDF document text
    • http://sistersaviopublicschool.com/userfiles/file/wowokizazez.pdfIn PDF document text
    • https://thehouseproduction.net/file/gufemajogaf.pdfIn PDF document text
    • http://3dprofi.net/images/uploads/file/41866478842.pdfIn PDF document text
    • http://onelove.cz/file/65396632976.pdfIn PDF document text
    • https://i-chat.tw/js/ckfinder/userfiles/files/dotekawosinefivelajoz.pdfIn PDF document text
    • http://bdsps.org/slbdavbatala/userfiles/file/wozemuka.pdfIn PDF document text
    • http://telegid.tv/userfiles/file/25270309178.pdfIn PDF document text
    • http://crystal-lamp.ru/uploads/files/75249604940.pdfIn PDF document text
    • http://uniroll.pl/user_images/file/98168761867.pdfIn PDF document text
    • http://salamino.pl/userfiles/file/29602332663.pdfIn PDF document text
    • http://textingrights.com/userfiles/files/5355975828.pdfIn PDF document text
    • http://flapboxes.custompackageboxes.com/userfiles/files/85414896585.pdfIn PDF document text
    • http://cssh.es/img/file/nadofizitusi.pdfIn PDF document text
    • https://ambalatender.com/upload/files/wuxakulesupuzepaxa.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

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b074.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB074 15164 bytes
SHA-256: dc868fc4b4c0265eb98b8874ef96adca60172dd2f3a92e5970bfbc8bb40ee414
font_01_sfnt_off0000d6f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6F7 10112 bytes
SHA-256: 8ae9e548505327fd329d33a84bbd13b465b052ece7a88afe65ffa14af3ebd32e
font_02_sfnt_off0000edc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDC4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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