Malicious PDF — malware analysis report

Static analysis result for SHA-256 60d5f81248cd433a…

MALICIOUS

PDF

82.6 KB Created: 2021-06-27 00:55:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 9bcf198d186724afac74df7c327c94d4 SHA-1: 4a71620446de9e470ff6209f11c662e3b0522966 SHA-256: 60d5f81248cd433ae09197213f61c77510b4eb9f36a7cf77c8ba091467d4cba4
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised WordPress sites, indicating a link farm designed to distribute malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware delivery. No scripts were extracted, but the structure of the PDF and its embedded URLs are indicative of a common malicious document delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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 http://intechsol.kz/wp-content/plugins/formcraft/file-upload/server/content/files/160b86493d3a70---xojuxigotafifaf.pdf
    • https://goldenparadisestsimons.com/wp-content/plugins/super-forms/uploads/php/files/406eca9a8a31c96ee923ffad0aef8b36/darusedisukil.pdf
    • https://www.saenger-ohg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160afb11ac5086---delivuzenenaxefazekeg.pdf
    • https://securitydm.rs/slicice/file/72696110502.pdf
    • https://www.azulejositurry.com/wp-content/plugins/super-forms/uploads/php/files/q7td8l9qtkocopjjterq4v00s7/kiperefoxasedu.pdf
    • http://www.danvillern.com/wp-content/plugins/super-forms/uploads/php/files/qib65nfjk2e69to81lh8bpl932/22982158850.pdf
    • http://telmeed.com/web/ckfinder/userfiles/files/nejowe.pdf
    • http://www.deco-interieure.com/userfiles/file/91828168732.pdf
    • http://wbbray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160801ffc2e7d8---35446393326.pdf
    • http://www.christinemartin.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607c29bee48c0---duwukefe.pdf
    • https://homeaestheticsllc.com/wp-content/plugins/super-forms/uploads/php/files/607f69836f08ee12d6a114f825f7724d/zuboximagir.pdf
    • http://rebizplus.com/userfiles/file/89440862298.pdf
    • https://equantumconsulting.com/files/files/divupesu.pdf
    • https://lederstuhlshop.de/ckfinder/userfiles/files/goronusuxitujufozeteda.pdf
    • http://www.kevinbrooks.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160b5a6565cb9d---3733723006.pdf
    • https://www.hamburgeriaagricola.com/wp-content/plugins/super-forms/uploads/php/files/7ssnofvc7k148gk8p13sp1da9j/48347899536.pdf
    • https://www.kiteschule-kiel.de/wp-content/plugins/formcraft/file-upload/server/content/files/160bf17d00e368---14453639478.pdf
    • http://www.peopleoftheheath.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0a964d6f07---nejolevo.pdf
    • http://short-story.ru/upload/file/nonebereba.pdf
    • http://stpetersame.com/clients/9/91/91902b33218228c9a3691be2563b71f1/File/80694379941.pdf
    • https://travelselection.us/wp-content/plugins/formcraft/file-upload/server/content/files/1607b3211b20c8---77170482624.pdf
    • https://www.lokalesichtbarkeit.de/wp-content/plugins/super-forms/uploads/php/files/9ie6hnnderk1hgd1akrul17n2a/suzuzebuxepabujuganojo.pdf
    • http://www.sunarnuricomuisvealisverismerkezi.com/wp-content/plugins/super-forms/uploads/php/files/9gbl7ha1oveat3t7rt54t3fbb4/59338469415.pdf
    • https://expeditions-travel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a1ba6e5840---voxejo.pdf
    • https://drivingschoolofnorthtexas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a329e4e9566---7678009190.pdf
    • https://actorconseil.com/files/file/rolusavosizodofineroni.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=yoga+book+pdf+with+pictures+free+download+in+bengali
    • 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_off0000dd80.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xDD80 16792 bytes
font_01_sfnt_off0000f592.bin
450f786d703201f1e96952caf3e03d683afd9f545e7d84ba6b2ddf1f552a30aa
pdf-font-stream PDF embedded font (sfnt) at offset 0xF592 17172 bytes
font_02_sfnt_off00012278.bin
ebdbbbca24bd6a6af7fca7a66cb7e711ece5e57cbf9acf292b04730b29e8f691
pdf-font-stream PDF embedded font (sfnt) at offset 0x12278 11300 bytes