Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e0a05301f636b0f…

MALICIOUS

PDF

85.2 KB Created: 2021-07-03 04:37:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 01c2a8d3bd619fde99a9b7b86cc8fba8 SHA-1: d232f0a5e04b41bb8c344399b5ca63df257d00bf SHA-256: 5e0a05301f636b0feecf9c008bd2a43292d578123ef7e7919dc54e113cff656e
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious Link

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It functions as a link farm, containing numerous URLs that point to compromised CMS upload directories, likely intended to lure users into downloading further malicious content or visiting phishing sites. The presence of multiple distinct hosts and the use of 'utm_term' parameters suggest an attempt to obscure the true destination and potentially leverage SEO tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://pankalconstructora.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a50331297d2---guribelubededotomexazaxeg.pdf
    • http://xn--9p4b29dncp2cc6y.net/upload/fckeditor/file/womavasabetizago.pdf
    • http://leap-egypt.com/wp-content/plugins/formcraft/file-upload/server/content/files/160722f6e05e33---jeraxe.pdf
    • http://xn--80aaa1acmiejxr6d7fg.xn--p1ai/data/files/fuxamakos.pdf
    • http://www.heksan.com.pl/file/gedevolozofubutataropesaz.pdf
    • https://idfusionllc.com/wp-content/plugins/super-forms/uploads/php/files/0387050b805de3bbc45e36975d3e924a/pekokazexavugajufexeb.pdf
    • http://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160961ccd453fa---84870838304.pdf
    • https://www.baileysmilk.com/wp-content/plugins/super-forms/uploads/php/files/330f4459baaba8766695893e65f5eb55/bijojifogaxaraj.pdf
    • http://bhsclassof70.com/clients/a/ac/acf0241a72c9eb28a719a759cf8a4748/File/welojasepusuwu.pdf
    • https://takiminsahada.com/wp-content/plugins/super-forms/uploads/php/files/g8b51i5kaekbg0qrshn4fdgkje/vurutimer.pdf
    • http://bandenplaats.nl/cmsimages/file/zirasojurulibivosimep.pdf
    • https://www.cdscabling.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1606eb6083a9e2---fetudepaxobureburuges.pdf
    • http://nguyenthaotech.com/upload/files/19206494049.pdf
    • http://www.hj-bouwt.be/wp-content/plugins/formcraft/file-upload/server/content/files/1607d7c982dbe0---24728792985.pdf
    • https://www.wflorlando.com/wp-content/plugins/super-forms/uploads/php/files/7a9fff43c1319b6d780453a935c3ddf4/wajepulovobididugi.pdf
    • https://primeodontorj.com/wp-content/plugins/super-forms/uploads/php/files/777ca2ccd0f6d3591c3526ac50329d60/xovarukewirod.pdf
    • http://lifestyleufa.ru/wp-content/plugins/super-forms/uploads/php/files/372a8569d3da9f52999b8d23b8cc664e/23527217745.pdf
    • http://exactblue.com/wp-content/plugins/formcraft/file-upload/server/content/files/160706a0d97cf1---35226998163.pdf
    • https://alshaabcoop.com/userfiles/file/bulimexolasuxi.pdf
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bac24317ec5.pdf
    • https://www.gasserbush.com/wp-content/plugins/super-forms/uploads/php/files/cf439e81277f46d7bb494f9da62b7d59/jotuvogisutilububud.pdf
    • http://ipvoicenj.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c9b7baa461---57228401988.pdf
    • https://chocoinmobiliario.com/wp-content/plugins/super-forms/uploads/php/files/75abf2a7cbe45c397cf9b82c4e7dbbb9/pefijopubetor.pdf
    • http://www.holderit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c16105d0002---56260301838.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=the+physiology+of+the+joints+kapandji+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_off0000e919.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE919 16792 bytes
font_01_sfnt_off00010130.bin
9ec01520ef1d3e976acf47672f124464e79f152b6c3e1ecf2d3abd5bf5212e2a
pdf-font-stream PDF embedded font (sfnt) at offset 0x10130 10976 bytes
font_02_sfnt_off00011a69.bin
6492d1abbb6dde2062608b39ee13fb3599a43ee1c5d3cdfe3b99c89a816f6093
pdf-font-stream PDF embedded font (sfnt) at offset 0x11A69 17168 bytes