Malicious PDF — malware analysis report

Static analysis result for SHA-256 7fc5c7c06dfe8372…

MALICIOUS

PDF

89.8 KB Created: 2021-09-02 14:25:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c548301638bb5a46a4f439c5492a65e9 SHA-1: 34caddbecb97af7da2c887e5f45b4c0f377d8a92 SHA-256: 7fc5c7c06dfe8372a18a3dc2200d6f9624c3c552d8076b81fe19b09c1ab1c4c1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains numerous links, many of which point to compromised CMS upload directories, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution through these links. No scripts were extracted, and the document body was unreadable, so the rationale is based on the PDF structure and URL analysis.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9761

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://beaufortbond.com/wp-content/plugins/super-forms/uploads/php/files/303ccabbbd809b7578cc890fec491446/58611112237.pdf
    • https://saftanton.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160830c9fcd07c---33541754987.pdf
    • http://madiran-cruduparadis.fr/ckfinder/userfiles/files/88062559698.pdf
    • http://bestforfishing.com/wp-content/plugins/super-forms/uploads/php/files/d2cd4951e994d9f147e08eb17438d90d/doxuxugiwilelan.pdf
    • http://fujavietnam.com/images/Download/20629360934.pdf
    • http://sieuthibds.net/images/files/tepurunaxej.pdf
    • http://aquatrustfina.com/userfiles/file/wexirawisizovivexiwusov.pdf
    • http://kino-profi.com/wp-content/plugins/super-forms/uploads/php/files/035587751057200110912a8fcf18835d/53091629250.pdf
    • https://grafitpoint.ru/wp-content/plugins/super-forms/uploads/php/files/ef08d5643b8f8c6d6f53ff37321da122/18633845774.pdf
    • http://skupka23.ru/upload/m/52650547831.pdf
    • https://capitaleny.com/wp-content/plugins/super-forms/uploads/php/files/2dc95c13cf7e0908b50d04ed070fb92a/vavinononisokomiro.pdf
    • http://www.carolglassman.com/wp-content/plugins/formcraft/file-upload/server/content/files/160900ff4ec96f---87217140949.pdf
    • https://www.grandiosa.is/wp-content/plugins/super-forms/uploads/php/files/t542hgrcvnq3vca0bm0oucnas1/tazilaremovoxazi.pdf
    • https://fleseriuassociates.ro/files/file/zepofomoxedirimuze.pdf
    • https://t4g.nasscomfoundation.org/wp-content/plugins/super-forms/uploads/php/files/r5d62qbso0vdo4gs1e46uejtl6/kazewubipalul.pdf
    • http://diamond6ranch.com/userfiles/file/77695520347.pdf
    • https://intelean.com/wp-content/plugins/formcraft/file-upload/server/content/files/16107e9ff14d53---wobajaj.pdf
    • https://brusroom.com/wp-content/plugins/super-forms/uploads/php/files/fe0ba90fe69342563d1b6d49bd0a85a8/86085635295.pdf
    • https://hgindustrial.eu/userfiles/files/xekerefisumofawawupodi.pdf
    • https://markzone.az/wp-content/plugins/super-forms/uploads/php/files/sguhe4kujdj47vdtmapp4r8qpn/53939311812.pdf
    • https://unitedcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a06f5c9dab---nosepugopapeno.pdf
    • https://www.digitalsofts.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610f3890ce143---71513676025.pdf
    • https://refundsrefunds.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e267aa4e111---82483918092.pdf
    • http://zawayakw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160acbd1560791---wanodusixabirozinoviwume.pdf
    • https://beautifullifeuk.com/wp-content/plugins/super-forms/uploads/php/files/2a52872edd41c4cc74485e15020a788a/taximoxogegilalenura.pdf
    • https://orsam.org.tr/paketler/ckfinder/dosyalar/files/topejasokivitipeluz.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=folklore+del+paraguay+dionisio+gonzalez+torres+descargar+pdf
    • 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_off0000e455.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE455 16792 bytes
font_01_sfnt_off0000fc62.bin
228445a3744f13af4bf84041e55802a923554d86926eb0745489ea117e4ab105		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFC62 1888 bytes
font_02_sfnt_off00010527.bin
823a7b810be26f1401b24f4fe8eb14f18112c2768474fb3edc2ad15cf8e92d61		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10527 22616 bytes
font_03_sfnt_off00013e3a.bin
b8edd2ef62503dfe362127ef778e1baaac781263aa374fe6928f5438298d2e6d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13E3A 11136 bytes

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