Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb661d772482afb1…

MALICIOUS

PDF

68.0 KB Created: 2021-05-29 00:32:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b2a88bcea55d2f57298471b0c17f1a67 SHA-1: 533cee3bd325b199e06e1b2252f88eadbe15e68d SHA-256: fb661d772482afb1111ee3edaa4d5a6dde16abcc729cb4903d97b15e16c41d5f
174 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress sites and some using IP addresses directly, indicative of a link farm designed to distribute malware or phish for credentials. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are consistent with techniques used to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8311

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608dc32fd8c84---51677831485.pdf
    • http://www.contectrade.hu/fckfiles/file/57209417053.pdf
    • https://www.c2commercial.com/wp-content/plugins/super-forms/uploads/php/files/81b348415c677e2730f966fd3168e065/muvoxorazuz.pdf
    • https://fjordancv.info/wp-content/plugins/super-forms/uploads/php/files/b16ddc9f8c7468409973b2f764545dc1/bezolojobazilu.pdf
    • https://spazmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090bc147d519---pesilagafukunanaja.pdf
    • https://takiminsahada.com/wp-content/plugins/super-forms/uploads/php/files/20ttai1ub3esea3vd36j0vahvj/rodedunigi.pdf
    • https://xlspandoek.nl/userfiles/file/55145364124.pdf
    • https://spazmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609588e819a2c---lapejojimojabevitonexe.pdf
    • https://namastehealth.in/wp-content/plugins/super-forms/uploads/php/files/c7imf2hncr7f0vkh91qtk7j0hd/3424076579.pdf
    • https://msr-hudsonproperties.com/wp-content/plugins/super-forms/uploads/php/files/a94c16ef9758b1f14451ee84b1f9a904/69026062133.pdf
    • http://ottotech.center/userfiles/file/jujudodedenajopolefe.pdf
    • https://asi-filter.pl/files/file/16172078640.pdf
    • http://vtracauto.com/wp-content/plugins/formcraft/file-upload/server/content/files/160788791b6c4b---lopoxurofe.pdf
    • https://balance-global.com/wp-content/plugins/super-forms/uploads/php/files/1g4ff81ga2a5tge76ie56aj6hm/kakisulubedat.pdf
    • https://angkortaxiservice.com/userfiles/file/fokev.pdf
    • https://na-nule.ru/wp-content/plugins/super-forms/uploads/php/files/qm598d4dv4p845kak9rv7v5io5/81880838220.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=easeus+data+recovery+13.2+crack+%2526+serial+key+generator
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e078.bin
9c45ea5d15f4c5e99567fdb6dc6f2308c53ec2cc38316b52c68bce67cbda481c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE078 5464 bytes

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