Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ff205cd246c331c…

MALICIOUS

PDF

60.2 KB Created: 2021-05-30 03:24:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 08819100054826831abbe39f1f7c7394 SHA-1: 2d9ec0a0c80c471b50bb0ee388edfbad22d6a04d SHA-256: 7ff205cd246c331cb38b55e34e84d0c332a14f7a22ce0b5f9d5a530776930ce6
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains a link farm pointing to multiple compromised WordPress sites, suggesting an attempt to distribute malware or phish for credentials. The ClamAV detection and ML classifier strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a phishing or malware distribution lure, likely delivered via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8123

Heuristics 5

  • 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
  • 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://ddriu.hu/wp-content/plugins/super-forms/uploads/php/files/8ddc8db6711dfb5e6c2856d313ad2920/vigidukogoboraw.pdf
    • http://timatey.kz/wp-content/plugins/super-forms/uploads/php/files/u6va5pvgps5qojdpk3rnm49fk2/47595608001.pdf
    • https://monarchwinemerchants.com/wp-content/plugins/super-forms/uploads/php/files/55f22a11a17ebebb1c69a8378444977c/neremovewiterebawixutula.pdf
    • https://rmissio.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1607c71e327a44---16895829882.pdf
    • http://ankamet.com/userfiles/file/17070512808.pdf
    • https://cashofferoregon.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7544f6cd20---46896821229.pdf
    • https://inchiriereelicoptere.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607a0ccbe7290---wiban.pdf
    • http://locthanhwindow.com/img_duhoc/files/noginumeguxinuf.pdf
    • http://adoriantarla.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a8762321f6d---53653113098.pdf
    • https://fourseasons.events/wp-content/plugins/super-forms/uploads/php/files/5e4ecce864787b223a5fd32996af2b7a/65221689953.pdf
    • http://www.loockuniformes.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/1607744bd9525f---vinex.pdf
    • https://ppuhperspektywa.pl/files/edytor/file/zamazuvirux.pdf
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a0a9366312---9998901782.pdf
    • https://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/08f2293b03a00ec621e034950c115d6e/safesagulupefaro.pdf
    • https://directprocessors.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b6e16318bb---kibolobagus.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=dls+2020+mod+apk+obb+data+download
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d1fd.bin
c0137e8e6f816bdae25de879357cf23b8792f648cd7d841a2cdcfe5bff0c2aff		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD1FD 5576 bytes

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