Malicious PDF — malware analysis report

Static analysis result for SHA-256 e32ce8412d05387c…

MALICIOUS

PDF

91.9 KB Created: 2021-08-02 17:49:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 4c2d7f2d251263e9f4488d8716ec3ab1 SHA-1: e30d6d12860ccb6d0b98e2dc0fee3a4c76060d84 SHA-256: e32ce8412d05387c3b180836e2a8c154a1272edec48a3bfb57e4329c0a534cf5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links, many pointing to compromised WordPress sites, indicating a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the PDF structure and embedded URLs are indicative of an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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.citysecurity.org.uk/wp-content/plugins/super-forms/uploads/php/files/d9c1nn4agi89aus486iuasjtdu/24694250651.pdf
    • http://www.thebetterinsurance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dda769116af---jufemodofafek.pdf
    • https://kamber.dk/wp-content/plugins/super-forms/uploads/php/files/945d1d69a46899dfd166536092f0785d/wosibubeti.pdf
    • http://vincityhomes.vn/wp-content/plugins/super-forms/uploads/php/files/4gkv7gnq65bulk5n2am547pttg/nureso.pdf
    • https://harpethvalleypto.org/wp-content/plugins/super-forms/uploads/php/files/89955580eb93db49b1a924dfd9f592ad/dekogunawam.pdf
    • http://bulgankhangai.mn/userfiles/files/duroruxilatidujonub.pdf
    • https://puertoestereo.com/wp-content/plugins/super-forms/uploads/php/files/0mgvp6mnuatpjfu993s4q9nkgf/tagajovakutan.pdf
    • https://businessservicesuk.com/userfiles/file/kobuvulikatekuziv.pdf
    • http://littlepearlbooks.in/data/eimages/file/30577294623.pdf
    • http://suleymanporoy.com/img/userfiles/files/zamujudajawide.pdf
    • http://protech.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/1606c95953d221---zegumopikazogok.pdf
    • https://www.sussexweddingservices.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c8afba7cbfb---78989160391.pdf
    • https://www.numberoneporthill.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c43704c1c03---79559258671.pdf
    • http://www.esthemed.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160c4bd1d74093---13889834021.pdf
    • http://www.bridalchapel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609238ffa3bc7---memodekojaxolav.pdf
    • http://effektfilm.de/files/file/nujitubasonulaxi.pdf
    • http://medicaldistri.com/ckfinder_files/files/73711226492.pdf
    • http://bluecars.pl/userfiles/file/mireb.pdf
    • https://aquaticlandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607863c479969---369531064.pdf
    • https://victory-agency.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cbb605ea381---31270302625.pdf
    • https://www.dazzlingdecor.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160bef9006e491---51017716151.pdf
    • http://mgmkt.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b0c73f4be28---girasetuf.pdf
    • http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609708b88f856---41505627494.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=how+to+buy+snowflake+ipo+share+in+nepal
    • 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_off000101b1.bin
99745919a367aff4e49625f6de44480dc3ae39e30dcb05249a5003aa2adf0521		 pdf-font-stream PDF embedded font (sfnt) at offset 0x101B1 10980 bytes
font_01_sfnt_off00011af9.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11AF9 16792 bytes
font_02_sfnt_off0001330b.bin
39515912b981148dd420d684fc2c9474e1f98476e5773efb8f9046ef8463a263		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1330B 17576 bytes

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