Malicious PDF — malware analysis report

Static analysis result for SHA-256 290680a864b9a9d0…

MALICIOUS

PDF

82.5 KB Created: 2021-09-01 09:16:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 979f0731758c92d555d82fd595e195ff SHA-1: f4992348d4f2bcca78b2d5f8f9004e869d16f822 SHA-256: 290680a864b9a9d09316502c36f93843562516d8c31be3cae8985a19c9ffabdf
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript and numerous external URIs, many of which point to compromised WordPress sites or disposable hosting. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the document is structured as a link farm, likely to direct users to malicious content or phishing sites. The embedded JavaScript, though not fully detailed, is a common vector for exploiting PDF vulnerabilities or initiating further malicious actions.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

Heuristics 7

  • 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.
  • 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://inwebjor.ru/uplcv?utm_term=does+a+parking+ticket+affect+your+driving+record
    • https://selectwifi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bcd8a144dff---94523012944.pdf
    • http://alternativefitness.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16090174125d94---18917779867.pdf
    • https://mangonebike.com/uploads/file/13205722924.pdf
    • http://ttccid.com/userfiles/file/rugopudekufelalupipusa.pdf
    • http://for-rent-leuven.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d061d8b6808---nojabatefidepen.pdf
    • https://kindliving.org/wp-content/plugins/super-forms/uploads/php/files/tmp/69254790757.pdf
    • https://stellabakingcompany.com/wp-content/plugins/formcraft/file-upload/server/content/files/160705124c324f---kolewazisuxirokiferazaz.pdf
    • https://rhdplumbing.com/wp-content/plugins/super-forms/uploads/php/files/ebd0b83f12f3d532b5693267419339a3/62758552621.pdf
    • http://beiwendq.com//data/attachment/file/72000249472.pdf
    • https://ngoctraithaibinhduong.com/uploads/news_file/64113571050.pdf
    • http://xn----7sbabjkhbzbqti4a3apfmdd2s4b.xn--p1ai/ckfinder/userfiles/files/74742131294.pdf
    • http://orchid-daikanyama.com/userfiles/file/mudosaxadosufu.pdf
    • https://nnkcreations.com/userfiles/file/luzakoxiwuziwidisalaxonuz.pdf
    • http://harmonie-avion.fr/actualite/files/67405007469.pdf
    • http://dspec-car.com/js/upload/files/susovazijolamitilenonom.pdf
    • http://broadviewlibrary.org/uploaded_bvlib/file/79728203527.pdf
    • http://somersetcountybar.org/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/jodofij.pdf
    • https://konferencii.ru/js/ckfinder/userfiles/files/88983659419.pdf
    • https://ferdavagnar.is/images/fck/file/gixogimaxumegumedifapuvot.pdf
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1611e7ff3c4024---69640598849.pdf
    • http://usdcp.jp/user_data/userfiles/files/letonusazotena.pdf
    • http://chaukitchen.com/uploads/files/nivil.pdf
    • https://stefandes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607437a697abf---29045889919.pdf
    • https://www.cukoyem.com.tr/wp-content/plugins/super-forms/uploads/php/files/anidm5919b78r3oqsgq7k6ua24/13163337130.pdf
    • https://www.c2commercial.com/wp-content/plugins/super-forms/uploads/php/files/6be7d1996229465d85da03341a51e2bb/jababuwemizegegosawe.pdf
    • 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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dd13.bin
480e56a9ce4baffd116f2df7d87916291b64c38f9fc964e51351dfa7c38f7408
pdf-font-stream PDF embedded font (sfnt) at offset 0xDD13 11124 bytes
font_01_sfnt_off0000f70c.bin
229c024a1582b783cf8b9aea0d6c10ce0142115fa2fc974a4bba347169e5fce8
pdf-font-stream PDF embedded font (sfnt) at offset 0xF70C 17276 bytes
font_02_sfnt_off00012399.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12399 16792 bytes