Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed9d5d29a03bb24a…

MALICIOUS

PDF

83.5 KB Created: 2021-11-04 04:46:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: acf18d766c36bbf8b109e1e1beabe500 SHA-1: a33033dc0ca763a1adbb5632fc8d67ecb84e0600 SHA-256: ed9d5d29a03bb24a0a2f2ad90063dc28dc5d9180d6d6b2d8e6c8ec0e21304012
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was identified as malicious by a ML classifier and ClamAV. It functions as a link farm, containing numerous URLs pointing to various websites. Several of these URLs are hosted on compromised CMS platforms, indicating a potential phishing or malware distribution scheme. No scripts were extracted, and the document body was unreadable.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://sheenabusesandcoaches.com/userfiles/file/39015730026.pdf In PDF document text
    • https://clubselect.ro/ckfinder/userfiles/files/kanipaxagixebak.pdfIn PDF document text
    • http://rungruangsteel.com/public/upload/userfiles/files/87760604084.pdfIn PDF document text
    • http://maydemtienvn.com/upload/files/sududaxuxagonedo.pdfIn PDF document text
    • https://ncfouting.com/wp-content/plugins/formcraft/file-upload/server/content/files/16175272e6de50---xilukatimefubesix.pdfIn PDF document text
    • https://dimensioninteractive.com/WYSIWYGImage/file/73155602391.pdfIn PDF document text
    • http://srihemkuntsahibfgp.org/hemkunt/userfiles/file/jogorobet.pdfIn PDF document text
    • https://jdconstinc.com/ckfinder/userfiles/files/zomaxojevenu.pdfIn PDF document text
    • http://studiopignotti.it/userfiles/files/6911389409.pdfIn PDF document text
    • http://argra.rs/wp-content/plugins/formcraft/file-upload/server/content/files/16158711505de9---98559327605.pdfIn PDF document text
    • https://www.xcelsus.de/wp-content/plugins/formcraft/file-upload/server/content/files/1617b589a54053---43695904368.pdfIn PDF document text
    • http://ilyxrace.com/userfiles/files/77942424080.pdfIn PDF document text
    • https://scalper.ir/data/files/file/debewigibagewa.pdfIn PDF document text
    • http://chaireyes.com/v15/Upload/file/202110241655281631.pdfIn PDF document text
    • https://feldmann.pl/userfiles/file/bajopomawip.pdfIn PDF document text
    • https://52fantasies.com/home/holly/public_html/ckfinder/userfiles/files/25572401728.pdfIn PDF document text
    • http://lehnerkom.de/images/uploaded/file/poveja.pdfIn PDF document text
    • http://metzpaintings.com/wp-content/plugins/formcraft/file-upload/server/content/files/161582fb6b751f---51684307511.pdfIn PDF document text
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/3f0b1f6ce4651f0b8ed40685ffb3ebb8/79165159617.pdfIn PDF document text
    • http://aftp.bg/userfiles/file/wobakor.pdfIn PDF document text
    • https://es21sys.com/userfiles/file/89096938703.pdfIn PDF document text
    • http://salamatekhanevadeh.ir/ckeditor/files/files/2572656890.pdfIn PDF document text
    • https://idroilektriki.gr/files/file/runoxexuwoxodobopofebogo.pdfIn PDF document text
    • http://feedproxy.google.com/~r/MbOu/~3/896FEnmJZlk/uplcv?utm_term=i+spy+with+my+little+eye+something+redPDF link annotation
    • 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e14c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE14C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f963.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF963 10828 bytes
SHA-256: f134dc05e8589fc5b8496da58cf1d460de67b4ff541ec48772bacb422cda28e9
font_02_sfnt_off00011201.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11201 17864 bytes
SHA-256: 80c4813c51726875110b7e5572b4d6a50b7398b19e3d3511d50d5ae9a08cf408

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