Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e07e08b99210cb3…

MALICIOUS

PDF

110.0 KB Created: 2021-06-27 16:06:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f42359a111b03a3582da373d0792a6cb SHA-1: bfe8a8c381779c983918a9ae9360ba4d779f8792 SHA-256: 4e07e08b99210cb3d72d9461690c27e6229bebd8790c3ce64889f2496b9faba0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

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

Machine Learning

  • Nyx PDF Classifier malicious score 0.9905

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://greenturtleproductions.com.au/wp-content/plugins/super-forms/uploads/php/files/1f0421aed646ace5cfc963ea4da3d98c/wejed.pdf
    • http://reclaimsplus.com/wp-content/plugins/super-forms/uploads/php/files/509038019963363811af98ea16daf7b4/kowazofasudilabijubefeno.pdf
    • https://www.histoiresdegroupes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c68047dcbb8---zeluw.pdf
    • http://www.jobsincrete.gr/images/_user_na/file/zanisobejekofikurabupe.pdf
    • http://www.alwaysflorida.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608fd5b435566---fipitonip.pdf
    • https://amesmedicalservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160851abfeffc9---60139629517.pdf
    • https://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d076eaa0629---62470600779.pdf
    • http://www.eflox.net/wp-content/plugins/formcraft/file-upload/server/content/files/16070cb7fd5324---roxemapef.pdf
    • http://varanini.pl/userfiles/file/vubimogew.pdf
    • https://parokisantolukas.org/Uploads/userfiles/files/524587284.pdf
    • https://actioncoach.com.my/wp-content/plugins/formcraft/file-upload/server/content/files/1607a0ee94d422---dilin.pdf
    • http://antik-cafe-bergen.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b754a040195---vivedawefovuwuxelajipa.pdf
    • http://salonlomi.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160b2ff6637f5a---pizokexek.pdf
    • http://nuraski.pl/wsg/userfiles/muxufebofejox.pdf
    • https://barrierball.cl/ckfinder/userfiles/files/13140373893.pdf
    • https://takeorders.online/wp-content/plugins/super-forms/uploads/php/files/ei2f3gjiia18pi51ctm8r5qm6c/lolonatigowa.pdf
    • http://cuacuonnhaxuongbinhduong.com/upload/files/mulibotopojumavomo.pdf
    • https://www.darrellstuckey.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9825390dfc---riwurepa.pdf
    • https://coachtourbusrental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a97d6a6bee2---4276338196.pdf
    • https://relleno-acidohialuronico.com/wp-content/plugins/super-forms/uploads/php/files/e70b194cab86bcac25c4f879a20f05dd/sidogaxozanomas.pdf
    • https://www.cir.cloud/wp-content/plugins/formcraft/file-upload/server/content/files/16086046376f0a---19125671541.pdf
    • http://thehawthornnyc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ee02e7f3ed---65590751364.pdf
    • http://structurecreative.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074a0465d3de---niroxotebipawusa.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=undigested+food+in+stool+and+weight+loss
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001342a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1342A 16792 bytes
font_01_sfnt_off00014c41.bin
3ba36c18d3f6db05ae8db04aadc00b7849cef2bf39c7170a119def0cdb2dd672		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14C41 10628 bytes
font_02_sfnt_off00016455.bin
64794009602ac6320d6f342430cb293439fbf1283c26b0c70b0cabe2bef15953		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16455 16484 bytes
font_03_sfnt_off00017ae4.bin
93403be1ee8b9e0df8ee0619fa894e253c83e46c3943b1933d84004366ba27d6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x17AE4 17460 bytes

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