Malicious PDF — malware analysis report

Static analysis result for SHA-256 1fe6b0a5f6551c12…

MALICIOUS

PDF

88.9 KB Created: 2021-08-07 00:30:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: b764aa746713a829204264cfaa67c5f4 SHA-1: 09c9566d05d8928d61f9293ef564a8f393366184 SHA-256: 1fe6b0a5f6551c124ebf283b81813e50257e8b3337a3fb6a91fead831ab1cae3
196 Risk Score

Malware Insights

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

The sample is a PDF file flagged by ClamAV as a phishing trojan. Heuristics indicate it functions as a link farm, with several URLs pointing to compromised CMS upload directories. A critical heuristic identified a 'Clipboard command execution lure,' suggesting the document instructs users to copy and paste commands into a shell. This points to an attack pattern where the PDF acts as a dropper, likely to download and execute a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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://jfefood.com/wp-content/plugins/super-forms/uploads/php/files/8cd228803a01aca7cf05b6ca8b185c64/63842249251.pdf In PDF document text
    • http://clubmaniacr.com/campannas/file/73491879976.pdfIn PDF document text
    • http://inspirationallabels.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160bef81585c6d---denilesima.pdfIn PDF document text
    • http://www.saraviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075aa7e3d23b---35077137554.pdfIn PDF document text
    • https://sv-fin.ru/wp-content/plugins/super-forms/uploads/php/files/13b54266a09384e7de3d4fbb6aae4cf3/nedokuvafedifubizafag.pdfIn PDF document text
    • http://kapelski.pl/userfiles/file/benasiruv.pdfIn PDF document text
    • https://tabularasa.lv/sites/tabularasa/uploads/documents/files/xikarimivuruti.pdfIn PDF document text
    • http://veganogle.es/uploads/ckfinder/files/tekitorir.pdfIn PDF document text
    • https://stellabakingcompany.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf21c196a46---fawesukiligadagokipuzige.pdfIn PDF document text
    • http://www.absolutecateringla.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609fc87b1157f---muzusoson.pdfIn PDF document text
    • https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/90cfec53a1e8127d43037427bb03fb7e/xonunevogiv.pdfIn PDF document text
    • https://rsun.pro/admin/ckfinder/userfiles/files/kujufudipujumavalafaxa.pdfIn PDF document text
    • https://activepymes.com/pub/file/11387486227.pdfIn PDF document text
    • http://interel-rus.ru/test/sites/default/files/file/80410610013.pdfIn PDF document text
    • http://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c6bca28eaef---zozibupitifevuzaxilup.pdfIn PDF document text
    • http://xinyuemu.net/assets/202106/files/20210613093100870009.pdfIn PDF document text
    • https://anmoul.com/userfiles/file/4060761550.pdfIn PDF document text
    • http://xn--b1adbbbaeqjtsflbfms0e.xn--p1ai/pict/file/gijalivug.pdfIn PDF document text
    • http://hertzlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/pemodu.pdfIn PDF document text
    • http://accessprecision.com/userfiles/file/datewajepuzadowudotifunop.pdfIn PDF document text
    • http://jamesirvinewedding.com/clients/f/f9/f947a18657f5d77a8fcd192ffd4ccf25/File/bonamumakolivaxaton.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=the+ultimate+guide+to+aliexpress+dronePDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f42e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF42E 17968 bytes
SHA-256: 0db527bcf69b372e99085a1821ed156ecc4c6f65ecf32b3001124e57dcc74303
font_01_sfnt_off000122d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122D3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013aea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13AEA 11004 bytes
SHA-256: 4f7bb36d0741ffe7c9a8132f2b6a07200f79c940841535a712f6fedc4ec7af8d

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