Malicious PDF — malware analysis report

Static analysis result for SHA-256 affd891068dbeec7…

MALICIOUS

PDF

82.0 KB Created: 2021-09-24 07:10:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d0fae7ef0ac1b04da97d138ca7e74f1c SHA-1: f265123ea8827954aa9c9cf30d3ac59e9d717b4e SHA-256: affd891068dbeec723ae35cabc8176b8e136bd5995337a362a732c0c68406a6e
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF contains embedded JavaScript and numerous external links, many pointing to compromised WordPress upload directories or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The embedded JavaScript is a common technique for exploiting PDF vulnerabilities or redirecting users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://bibliotheque.ville.deux-montagnes.qc.ca/ckfinder/userfiles/files/dofibavakabofanozen.pdf
    • http://rebeccaosborne.com/uploads/6424754083.pdf
    • http://imaginove.eu/data/Files/wazufitutumepifejatevafa.pdf
    • http://modaxch.com/userfiles/files/79080299729.pdf
    • http://www.radiopopiatej.com/wp-content/plugins/formcraft/file-upload/server/content/files/161364f86b435e---tumobiluz.pdf
    • http://ichieh.tw/uploads/files/202109211153472100.pdf
    • https://soudurelausiere.ca/upload/editor/file/62404202556.pdf
    • http://luxcottage.ru/stroykamen/userfiles/files/xuxizimijixoluwadesilegeg.pdf
    • https://aiwcecckolkata.org/FCKeditor/file/xepanexorokixuregi.pdf
    • https://swapnauraan.com/ckfinder/userfiles/files/jumaj.pdf
    • http://friluftsgruppen.se/wp-content/plugins/formcraft/file-upload/server/content/files/1613d37dbea718---28446093120.pdf
    • https://keiba-like.biz/js/ckfinder/userfiles/files/18254708373.pdf
    • http://intertexmedical.com/userfiles/files/widewolikusajaviwemivuvu.pdf
    • https://phuketwebstudio.com/ckfinder/userfiles/files/dadexawapegasiletijometul.pdf
    • https://maidintown.co.uk/wp-content/plugins/super-forms/uploads/php/files/d3c00443d853a978d5474726fd2b8958/ropepegomazijoposexepi.pdf
    • http://cmuniontravel.com/userfiles/file/91478948221.pdf
    • https://superchills.com/userfiles/file/87781746379.pdf
    • http://engroupe.ca/aym_image/files/kesujud.pdf
    • https://thehouseproduction.net/file/bofixelutenazawekivopimo.pdf
    • https://hglobaltourb2c.com/FileData/ckfinder/files/20210906_8E9BB66621953F14.pdf
    • http://uniondeautoescuelas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613146c5a6d50---31713510003.pdf
    • http://cc-loges.com/uploads/file/41306935685.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=restore+deleted+app+on+android
    • 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_off0000dbd6.bin
f581a70b776e1770b177ae605fa91b690fbdbf3dbef1184016d999bb176981cf
pdf-font-stream PDF embedded font (sfnt) at offset 0xDBD6 18012 bytes
font_01_sfnt_off00010a80.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10A80 16792 bytes
font_02_sfnt_off00012297.bin
806ddc7deb8917618438fdbb90c2c4c862821617a37ab2836f37e286a3cd7bb8
pdf-font-stream PDF embedded font (sfnt) at offset 0x12297 10432 bytes