Malicious PDF — malware analysis report

Static analysis result for SHA-256 486ac08eb187cfb4…

MALICIOUS

PDF

73.2 KB Created: 2021-07-04 08:50:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: dad8793cab5da38644e8185eb47268c3 SHA-1: 95e06139c05822c90aaa3400e76dd962eee924f1 SHA-256: 486ac08eb187cfb42a629e768f06230dbba97668f0964f807e422844081ff5ad
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many of which point to websites hosted on compromised WordPress installations, indicating a phishing or malicious redirection scheme. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to lure users to malicious sites or download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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 http://lakehighlandsrw.org/clients/863582/File/rabuvasuvidaramovezexobi.pdf In PDF document text
    • http://pileshoppen.dk/userfiles/file/51237679503.pdfIn PDF document text
    • http://bochosushi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fd18aca5a8---49329662442.pdfIn PDF document text
    • http://theydeserveastamp.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608365cd14944---34721247330.pdfIn PDF document text
    • http://commsoft.nu/demo/ktb/wsmbilder/files/44670248065.pdfIn PDF document text
    • http://bronia.org/userfiles/file/pobewugakudujekibufatate.pdfIn PDF document text
    • http://beveragesgs.com/userfiles/file/zoxexijufon.pdfIn PDF document text
    • https://mattweidnerlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085fbbe9132b---57781766773.pdfIn PDF document text
    • http://spreewaldatelier.de/img/editor/file/83235035411.pdfIn PDF document text
    • https://healthmatters.me/userfiles/file/mebedokajogimur.pdfIn PDF document text
    • https://jamiatulbanat.in/wp-content/plugins/formcraft/file-upload/server/content/files/1608e93472ee5b---82698552493.pdfIn PDF document text
    • http://loveperfectionschool.com/upload/file/38619930642.pdfIn PDF document text
    • http://www.kliningstroy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a613f494ec8---9243649725.pdfIn PDF document text
    • http://chagatea.ru/wp-content/plugins/super-forms/uploads/php/files/654fa43a5c9f86851ac580a3455fcd5c/digusegetuvofo.pdfIn PDF document text
    • http://www.insurancedirectcanada.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160966f2cc1812---bewatunagekajigofe.pdfIn PDF document text
    • https://laser-arena.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16074a7fba85ab---doduv.pdfIn PDF document text
    • http://firegallery.ru/img/upload/dovadufadav.pdfIn PDF document text
    • http://richmore.kr/uploadfile/fckeditor/file/jugagepoviboxi.pdfIn PDF document text
    • http://thingsantiquesla.com/userfiles/files/65841897253.pdfIn PDF document text
    • http://a-range.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160c456617ada5---68980014623.pdfIn PDF document text
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/k64t6q98somnu32q7ojdtu05l6/99507500392.pdfIn PDF document text
    • http://51-lq.com/userfiles/file///22232940226.pdfIn PDF document text
    • https://donnasalon.ru/wp-content/plugins/super-forms/uploads/php/files/f4e3d9549a6c17c3ce34526701d7d220/14544700962.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=reacquaint+in+a+sentencePDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b912.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB912 17340 bytes
SHA-256: ba9ec3e5306761cef7ca70fabfe8478ad7d460dd6b1e934e87859425e804c60f
font_01_sfnt_off0000e698.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE698 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000feaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEAF 10248 bytes
SHA-256: 68a1836e0069df8901610d188901f187787897a7ccb4f39946ddc5cc05047a0e

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