Malicious PDF — malware analysis report

Static analysis result for SHA-256 987798bf71d8e192…

MALICIOUS

PDF

69.4 KB Created: 2021-05-26 08:24:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ff89de535c63c202578b3c3df2bef8f9 SHA-1: 0d1578f39a26081b11981722b9dae2bba6c8e9e0 SHA-256: 987798bf71d8e19200bb12135cdb5b67600442d5d5cd417d812f1f6787bea084
154 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a link farm pointing to compromised WordPress upload storage, suggesting it is designed to redirect users to malicious content. The document body, though heavily obfuscated, appears to contain search-related terms, likely as a lure to disguise the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9889

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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
  • 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://artmetinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086aedce62d1---17132758224.pdf
    • https://www.hungryalex.com/wp-content/plugins/super-forms/uploads/php/files/k2r55gi0g65rtoro77n862rdt1/tazeti.pdf
    • http://www.advancedevents.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16089f3b7aaa78---95290652259.pdf
    • https://3dreamvr.com/wp-content/plugins/super-forms/uploads/php/files/addd9febb9a7fb6fd3767abb61437464/fadosadizijekizezavatosu.pdf
    • https://askopenko.com/wp-content/plugins/super-forms/uploads/php/files/0d0586904d90405f3629070373fc94f9/48528546910.pdf
    • http://shethof.ch/cgi-bin/dynamisch/file/midemekukiponogaro.pdf
    • http://www.makattakasinti.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc344e7496---bugijixolewemefurib.pdf
    • http://www.restorationservice.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160ad4d804e4a6---94602736365.pdf
    • http://geology.ie/wp-content/plugins/formcraft/file-upload/server/content/files/160acb479eea36---xopelugonarafopozibo.pdf
    • http://progfin.pl/userfiles/file/tijakoxoduken.pdf
    • https://evenimentecastel.ro/wp-content/plugins/super-forms/uploads/php/files/9ijbjt4n2i2g6gga6hjiji0482/wisivavasagekawi.pdf
    • https://earthchartercities.org/wp-content/plugins/formcraft/file-upload/server/content/files/160740e5aca120---wijonujikiki.pdf
    • https://functionalmovement.gr/wp-content/plugins/super-forms/uploads/php/files/c42f6574b2fc64f4c079e2d828c1b2eb/podixunotodamenuwosuxo.pdf
    • http://smartcookieacademy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e7216aadff---zowusisezuzilewazar.pdf
    • http://blpest.com/UserFiles/file/fuguguwe.pdf
    • http://www.mondzorgvesa-voorschoten.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a3717cb02be---21297322014.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=queen+size+mattress+ikea+uk
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000de91.bin
263bbf5f752778a84bedff0617c5dcfd7a7c156c6678c70e3f76b3dd63602d08		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDE91 4748 bytes
font_01_sfnt_off0000ee96.bin
6456e756df71a7818377e94ebf695ef83e99d91b5cc916181603bc3af3094d99		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEE96 10496 bytes

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