Malicious PDF — malware analysis report

Static analysis result for SHA-256 97db5e4998bfc15c…

MALICIOUS

PDF

83.8 KB Created: 2021-06-25 12:59:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 4b5036db066775150558a0d98bdccc09 SHA-1: 6dcb0eb82a736022d699cbee5817b4374b3831f0 SHA-256: 97db5e4998bfc15ce6fc80dc3b60e0004bc43d6005e8143882dca740b60d7a7e
156 Risk Score

Malware Insights

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

The PDF contains a large number of links, many pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://philabc.ru/uplcv?utm_term=brought+with+it+synonym
    • http://www.canadavisaservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160865417277b9---25051439196.pdf
    • https://rajaunited.com/contents//files/33445960857.pdf
    • https://autosofortkauf.ch/wp-content/plugins/super-forms/uploads/php/files/ge34b7c4b1a9q1ukan5kagcm88/lezupukefevex.pdf
    • https://www.lightingsolutionsal.com/wp-content/plugins/super-forms/uploads/php/files/a575630ba586ada3f7f43042bb1ae4d4/rizakulekevip.pdf
    • http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160873db6c383f---xezovim.pdf
    • http://call.ae/wp-content/plugins/formcraft/file-upload/server/content/files/160a4da361e707---vixijokofetazoguk.pdf
    • http://haustechnik-hagenauer.at/74159672492.pdf
    • https://halobysciton.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0eb00a21ae---11694016906.pdf
    • http://herodumpsterrental.com/wp-content/plugins/super-forms/uploads/php/files/d08ce608361bb933015b4dfdf4795b7a/vivewejezovaxiwekula.pdf
    • https://www.synergyheart2heart.team/wp-content/plugins/super-forms/uploads/php/files/fatkl9fplhs50u141llh2q2fmb/lutatonidapoxejo.pdf
    • https://vickers-electronics.co.uk/wp-content/plugins/super-forms/uploads/php/files/b16970352bd698dba8c15f95a16c6012/fikiloditi.pdf
    • http://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082d9ae92791---fasinow.pdf
    • https://www.americanapi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086698113b4e---4076209609.pdf
    • https://proff-doors.ru/wp-content/plugins/super-forms/uploads/php/files/b36fc84cf783ba9ca3a71c76a80461f3/zapekezagafisibokivubip.pdf
    • http://xlsferrosilicon.com/d/files/jovevibubobisexamutuf.pdf
    • https://hcs1000.org/wp-content/plugins/super-forms/uploads/php/files/dfd8d219c0557e94b422374c5c018364/58574189837.pdf
    • https://unicornproduction.gr/wp-content/plugins/super-forms/uploads/php/files/2fb4a408010707777d6bd99883d8ea78/bazebawedurokosanoga.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e61f.bin
d38a3bc2293af22ffb53e19697f269b5c0524c27dfc949bd98b31dfadd3a0f4b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE61F 17140 bytes
font_01_sfnt_off00011291.bin
4991f3cdea7741ab5e75f4cc1671465438b92042ba1b1b2db93cd7d6bc7f2074		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11291 10568 bytes
font_02_sfnt_off00012a94.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12A94 16792 bytes

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