Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb79fb22772a55a3…

MALICIOUS

PDF

100.0 KB Created: 2021-07-17 22:10:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: a6cdee69dbda857ac60229c844803354 SHA-1: 8bb5bced8a962877a18b4ff6c5ea5b59ee151140 SHA-256: eb79fb22772a55a388e2914e7a72420853b7008762f7b4c393bb91a6b290b7ed
216 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document was flagged by ML classifiers and ClamAV as malicious, specifically identified as a phishing trojan. The heuristic 'SE_SECRET_RECOVERY_LURE' indicates the document's intent is to trick users into providing sensitive recovery information. While no scripts were directly extracted, the presence of numerous embedded URLs, many pointing to compromised CMS upload directories, suggests a phishing or credential harvesting campaign, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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
  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • 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://jingluo.net/uploadfiles/files/6453353407.pdf In PDF document text
    • http://ajk-opakowania.eu/upload/fck/file/rizapopimusojev.pdfIn PDF document text
    • http://aiswaryamatrimonials.com/fck_uploads/file/wixixataguni.pdfIn PDF document text
    • http://mountcalvary76.com/clients/9/90/9062e1c9f2360b2cedac6e2854879500/File/71571774383.pdfIn PDF document text
    • https://neoville.ru/wp-content/plugins/super-forms/uploads/php/files/ec0836487e7e964dcd4a7087a95546ac/nipojid.pdfIn PDF document text
    • https://www.bouwenaaneensterkwerkgeversmerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16074ffead0ab0---varelesinekivime.pdfIn PDF document text
    • https://paklya.su/design/img/upload/file/28423474841.pdfIn PDF document text
    • https://agrilaui.com/userfiles/file/xofosakemetilawugimox.pdfIn PDF document text
    • https://www.delaneyllc.com/ckfinder/userfiles/files/xevadekafiwupizuloxaz.pdfIn PDF document text
    • http://heilpraxis-pankow.de/wp-content/plugins/formcraft/file-upload/server/content/files/16098baddf085e---81784906369.pdfIn PDF document text
    • http://www.finanzanlagen-honorarberatung.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609290a823e4f---nonoxusafuxavukoneli.pdfIn PDF document text
    • https://lawpropertyconsultants.co.uk/wp-content/plugins/super-forms/uploads/php/files/msl440ardp46t7nvvrjm7hsqkf/nenabajodegup.pdfIn PDF document text
    • http://zoltysnieg.pl/pliki_wyswig/files/raxelifebepi.pdfIn PDF document text
    • http://inewbus.com/wp-content/plugins/super-forms/uploads/php/files/p8nhjnorbtoa2atbbltja69ic2/68981654702.pdfIn PDF document text
    • https://smoothnomad.com/wp-content/plugins/super-forms/uploads/php/files/cr4i89n5161382jlll72vt8mc0/gufikif.pdfIn PDF document text
    • http://chinalanpa.com/images/upload/File/76255103957.pdfIn PDF document text
    • http://yatros.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16073fbf7d1b36---36548914232.pdfIn PDF document text
    • http://www.lentilles-progressives.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160971a2442e72---10488637971.pdfIn PDF document text
    • https://championsforchildren.org/wp-content/plugins/super-forms/uploads/php/files/d1fcf30793a3d959730eab24c1c41f97/32647349028.pdfIn PDF document text
    • http://gdwtechnology.com/fckeditor/file/sobulumi.pdfIn PDF document text
    • https://eminenceconstruction.ca/viking1/uploads/files/42088148178.pdfIn PDF document text
    • https://www.endthestigmacounselling.com/wp-content/plugins/super-forms/uploads/php/files/egipi833ohu61gaqed0f9em5u6/belomamokirova.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=case+tools+are+used+to+compile+programs+to+test+for+logic+errorsPDF 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_off00012145.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12145 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001395c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1395C 10992 bytes
SHA-256: 796042b8b81d72ea341d86b4b865b48460c2974f973b092e950d22e52d392dd8
font_02_sfnt_off000152b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x152B7 17980 bytes
SHA-256: 6742f3bf4994c7f01fb3f4a9ae124e2fe7551cf75ec089d2a8ec26bca6832888

Open this report in the interactive analyzer, or submit your own file for analysis.