Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d196a85fbacf75f…

MALICIOUS

PDF

112.7 KB Created: 2021-05-26 05:19:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-29
MD5: b4f673ba930b9ac1aa9b80c17b044064 SHA-1: 585189a9541fdccce1081ae08d42a07e3d528b57 SHA-256: 2d196a85fbacf75f10f4b1bb8a44aa9b1f55acfb1fe9a5008a018918672eb45a
156 Risk Score

Malware Insights

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

The PDF contains multiple links pointing to compromised WordPress sites, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://www.swx.global/wp-content/plugins/super-forms/uploads/php/files/157a3784dcf5a1d72d8964092254d4de/99187332624.pdf In PDF document text
    • https://hosvagyok.hu/userfiles/file/83888608620.pdfIn PDF document text
    • https://www.autodepotperformancegroup.ca/wp-content/plugins/super-forms/uploads/php/files/26fug2uuit61p3org1kg9mcund/xekapupif.pdfIn PDF document text
    • http://adoriantarla.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160718b8ec9e58---pifanaletejejirazokera.pdfIn PDF document text
    • http://cetinelektrik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1608ff9057923e---wogifetuvekadaju.pdfIn PDF document text
    • http://erbilsunhotel.com/wp-content/plugins/super-forms/uploads/php/files/u7pg6bp2bkl55778kq3n74c5u2/24734853240.pdfIn PDF document text
    • https://www.denisonlandscaping.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099aaeda0a49---71798186100.pdfIn PDF document text
    • https://www.traveltimevipp.com/wp-content/plugins/super-forms/uploads/php/files/b29f319382d0a5d89f12d1eae35279aa/90959578482.pdfIn PDF document text
    • http://amandamaitland.com/images/file/12435033778.pdfIn PDF document text
    • https://jetzterstrecht.hamburg/wp-content/plugins/super-forms/uploads/php/files/v82kbje8fvsmih91bj844o2nqv/40010599583.pdfIn PDF document text
    • http://timavoshipsupply.it/userfiles/file/fumeripabelola.pdfIn PDF document text
    • https://daleplumbinginc.com/wp-content/plugins/super-forms/uploads/php/files/2b73d79337e19c91751ab7145f8d9881/24998944400.pdfIn PDF document text
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/4e62286ad6c1757e6c1117cef9ec7da1/74107237878.pdfIn PDF document text
    • https://scavilecis.it/userfiles/file/51922654586.pdfIn PDF document text
    • http://scheidenschiedam.nl/uploads//file/30403926432.pdfIn PDF document text
    • https://aawyx.com/sites/default/imageuser/file/ranususasubabi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=restatement+second+of+contractsPDF 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00016f9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16F9B 4884 bytes
SHA-256: fa203184c2d986cdd0adba6fbc71ead4149dd920872b326a80f694c097942aa6
font_01_sfnt_off00018012.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18012 11628 bytes
SHA-256: 59a9bc537f946bc3d2fa29a44829d9452a0aea90c17c4b36e40d52e2e838d85d
font_02_sfnt_off0001a728.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A728 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3