Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9481f44f2eecbd5…

MALICIOUS

PDF

83.0 KB Created: 2021-06-25 13:01:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 73f1764d9a4ae4ca90f9883245c43a9d SHA-1: 1c206d0196e26fbcb17397f50f580b86e11e64b7 SHA-256: e9481f44f2eecbd5ba16785b4d066772ff39b0447c2851ed82eb0a535f9b10f7
156 Risk Score

Malware Insights

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

This PDF was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. The document contains numerous links to external websites, many hosted on compromised CMS platforms or disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of these links and the overall detection indicate an attempt to deliver a payload or phish credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://wastran.ru/uplcv?utm_term=direct+face+to+face
    • http://youandisagenix.com/ckfinder/userfiles/files/91537104096.pdf
    • https://bechtoldpaving.com/wp-content/plugins/super-forms/uploads/php/files/ab7e003feef5745393358a2b047c3ab9/10317608458.pdf
    • http://jjmcp.jp/userfiles/Image/file/39751896485.pdf
    • http://ajivikafinance.com/userfiles/file/bawetilogelemamepixofuk.pdf
    • https://glasschneider.koeln/wp-content/plugins/super-forms/uploads/php/files/h4o7opho3btpo8km7cnbig957n/46438851628.pdf
    • https://flycam.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160c6c6b4ee17b---11623116525.pdf
    • https://yournew.site/wp-content/plugins/super-forms/uploads/php/files/ngcm65bnput317d5hu0lilau5q/jorijimozepagemerol.pdf
    • https://dacoma.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607ea6c4743e9---35016838311.pdf
    • http://diagonal.org.ar/wp-content/plugins/formcraft/file-upload/server/content/files/160af86b1d2d63---wajebasofajigezuda.pdf
    • http://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b83a2389321---memesilifomopafitukewi.pdf
    • https://teplitsyoptom.ru/wp-content/plugins/super-forms/uploads/php/files/da6711bdd7ce5afee277e0dc405ab5ca/91001448845.pdf
    • https://rhdplumbing.com/wp-content/plugins/super-forms/uploads/php/files/1cf8db387d1d3cc8fde3b822e6d2489b/97040142279.pdf
    • https://www.traveltimevipp.com/wp-content/plugins/super-forms/uploads/php/files/e403afc303bdb1b6e1c894cacddaa2d5/29282935453.pdf
    • https://www.die-umzugsfabrik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b4527381b28---rolavokabomemujawowuwini.pdf
    • http://ajivikafinance.com/userfiles/file/pimugavorawu.pdf
    • https://hopefor.today/wp-content/plugins/super-forms/uploads/php/files/b26d528ce584a8e67e0dd639ec80bd96/55620854636.pdf
    • http://smartmedicaleg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c6a9025de01---52451931885.pdf
    • https://www.lindopoint.it/wp-content/plugins/super-forms/uploads/php/files/79bafdcd48adcfaf39d5bfb1c751daf3/79862686694.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_off0000e54f.bin
ec98af4abeafeb79708a8cf0ce392a55e9e0e75af1aa98e5bb149404a833884f
pdf-font-stream PDF embedded font (sfnt) at offset 0xE54F 10012 bytes
font_01_sfnt_off0000fbab.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xFBAB 16792 bytes
font_02_sfnt_off000113bd.bin
2c2c221d8da355dd13effc6714bc776835f91c4b9a6b93250a566c8dc1871b07
pdf-font-stream PDF embedded font (sfnt) at offset 0x113BD 16700 bytes