Malicious PDF — malware analysis report

Static analysis result for SHA-256 60e3469006fe2c30…

MALICIOUS

PDF

106.6 KB Created: 2021-08-22 06:33:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: 58e613b7b5416515d71fe1104993f7ef SHA-1: 9ef9420a83bcb8794c4053838827138aa5486e65 SHA-256: 60e3469006fe2c30c126d00b295ddbefe0a55a51fdbd3c9c0b2a1098b5f2372b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Several heuristics identified it as a link farm hosted on compromised WordPress sites, suggesting it is designed to redirect users to external malicious content. While no scripts were explicitly extracted, the nature of the link farm and the PDF format itself often involves embedded JavaScript for redirection or exploitation, hence the inclusion of T1059.007.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9898

Heuristics 6

  • 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
  • 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://www.psstrecno.sk/wp-content/plugins/formcraft/file-upload/server/content/files/1610fc12394d2a---27494371396.pdf In PDF document text
    • http://xn--b1ahhafccpgkb2bxo.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/baae8e822936380cd068e21e582c4dcd/1533855496.pdfIn PDF document text
    • https://www.sahabatkeluargahomecare.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078a44c4ffe3---54513796703.pdfIn PDF document text
    • http://newtarrytowndeli.com/uploads/files/31375201926.pdfIn PDF document text
    • http://project-lovcen.me/userfiles/file/39256129803.pdfIn PDF document text
    • https://sharidendesignasphalt.com/wp-content/plugins/super-forms/uploads/php/files/3e185388f6a1c9fffe7109e97676d85f/kawopumubivawutajobox.pdfIn PDF document text
    • http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9ed18eea9a---14794552218.pdfIn PDF document text
    • https://www.rekalibracija.com/wp-content/plugins/super-forms/uploads/php/files/fc318bbb2847563204b86317f7f80e50/48065618452.pdfIn PDF document text
    • http://limpiasol.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be8864a8332---wevovosexosezidaziva.pdfIn PDF document text
    • http://acetuitioncentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607d607a0d97f---90848420319.pdfIn PDF document text
    • https://greyquotient.com/wp-content/plugins/super-forms/uploads/php/files/dff159ab5f08b8d4b1c28e0b9f98abcc/96486892237.pdfIn PDF document text
    • https://dermo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160969541831b8---7715228509.pdfIn PDF document text
    • http://pulsrmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160805e448a0ab---xunusijosumowusedaxipotup.pdfIn PDF document text
    • http://bogelaipigeon.com/upload/file/30821706900.pdfIn PDF document text
    • http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081d01c0a553---65515785673.pdfIn PDF document text
    • http://deurwater.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081c0ad9190f---72774862880.pdfIn PDF document text
    • https://wagaskar.com/media/44518352331.pdfIn PDF document text
    • https://christembassyromford.org/wp-content/plugins/super-forms/uploads/php/files/fe62ebd18f40e0991d80a04b20bba535/gaviwinexesoj.pdfIn PDF document text
    • http://www.nbc.com.vn/ckfinder/userfiles/files/jibakixilivuxujafukatamu.pdfIn PDF document text
    • http://vijyaiprismcrm.com/userfiles/files/49344429539.pdfIn PDF document text
    • http://frigotechreina.com/userfiles/files/wiwip.pdfIn PDF document text
    • http://fine-trading-knotwork.com/uploads/media/gejutuf.pdfIn PDF document text
    • http://yachtandgulet.com/userfiles/file/65696514466.pdfIn PDF document text
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/72d500se487u53b0ec48uem3j8/54340816812.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=literary+devices+definition+and+examples+quizletPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f1bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1BD 19172 bytes
SHA-256: 78ca0f6d5324ae908545830f3bf0a6e28b1933a5b6d49e38e9f2a36d65a5b51e
font_01_sfnt_off00012271.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12271 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013a88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A88 11324 bytes
SHA-256: da959b397038ac8d3581efdb270e0cc724dbf1b6bfc0e85d2961466a3d7fd093
font_03_sfnt_off000154fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x154FE 23124 bytes
SHA-256: 36c9998029fff4773c229bd7ac196de4333978c36b985370d9dadb5387bc306f

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