Malicious PDF — malware analysis report

Static analysis result for SHA-256 db13e63c0d46e931…

MALICIOUS

PDF

69.9 KB Created: 2021-06-01 11:46:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 854e2ca3512930c6318205ceccd0b218 SHA-1: afb8147c364c58fbfc0a6433492f44d61b4794d4 SHA-256: db13e63c0d46e931590d79cf736d00a1c762118ba11fff7c859a80e80bc358fd
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a link farm pointing to multiple compromised WordPress sites, likely intended to host phishing content or further malware. The document body, though partially obfuscated, suggests a lure related to Minecraft schematics, which is a common tactic to entice users to click on malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://augsburger-dartliga.de/uploads/file/tifopazumigosux.pdf
    • https://sip7.pl/autoinstalator/sip7.online/wp-content/plugins/super-forms/uploads/php/files/2a4bd160bc2152a1107a7671f20ed70c/125676069.pdf
    • https://binhruamuinanobac.com/wp-content/plugins/super-forms/uploads/php/files/nk7omcs62aehinfj55qddadc1t/xiwijiwakekoratawolufexaf.pdf
    • https://fietenhaardenenkachels.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160831779ccdd3---xejuvuviwo.pdf
    • https://www.chinacimctrailer.com/wp-content/plugins/super-forms/uploads/php/files/992cb7b5c138bc151903dbcfe631b84b/zuwimobejedine.pdf
    • https://brahmagnanam.org/fck_uploads/file/88515575093.pdf
    • http://ttlengenharia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608e4f9dae089---susetekavopow.pdf
    • https://fitnessrev.net/wp-content/plugins/super-forms/uploads/php/files/gb4esgrvud1shentn403u2btaj/kapesorezirarubike.pdf
    • http://ahxxzx.com/userfiles/202104/file/27989361797.pdf
    • https://freedomhypnosisnyc.com/wp-content/plugins/super-forms/uploads/php/files/77e791797f93c4cd0229e8f8bcde0fa8/pimavesabusud.pdf
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160ac06472db69---51641575062.pdf
    • https://www.dyna-tech.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b44fcba50c5---wufadanirekogitawumesuj.pdf
    • https://www.demetagras.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077c69b1b6d9---vemenud.pdf
    • https://saftanton.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1607313a3324d6---naxodopapavaza.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=how+to+add+schematics+to+minecraft
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d5a6.bin
2e4b744d988c24d8356c07b73ad5a3096f71e283462851639ae976cd428c9ba2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD5A6 5280 bytes
font_01_sfnt_off0000e783.bin
3c8858d2195ed2c2b01cd80d10836181bc834c2c0d080ef0353612f41d1f3093		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE783 10392 bytes

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