Malicious PDF — malware analysis report

Static analysis result for SHA-256 550625608f26fcf2…

MALICIOUS

PDF

84.8 KB Created: 2021-09-04 01:52:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: a18a3e05aa077aca915360814efc578a SHA-1: 6eff41e7344f8847e68dd7bf7bab17a583a0696f SHA-256: 550625608f26fcf2808bd2dc5362546feac5096c8adab7c973c31982a2177a0e
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many of which point to compromised websites or disposable hosting, indicating a phishing or malicious redirection attempt. The ClamAV detection and ML classifier strongly suggest malicious intent, likely to lure users to malicious sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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://futurepoolandspa.com/ckfinder/userfiles/files/7923895042.pdf
    • http://evola.it/userfiles/files/kinibixolefemitixenem.pdf
    • http://www.tecnotrefg.it/wp-content/plugins/formcraft/file-upload/server/content/files/160ae42ebcc341---60195227040.pdf
    • http://nek.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160943aa322cd3---lomewifo.pdf
    • https://www.lowdoc-loans.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16117238be6928---dixageripozasosun.pdf
    • http://goldmustang.com/files/files/2837961044.pdf
    • http://habitat3.eu/userfiles/files/foxexudifovadipanawa.pdf
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f122b2ad9d---64809463322.pdf
    • http://whuntex.info/userfiles/file/gupigexose.pdf
    • http://toyotacri.com/userfiles/files/11676821081.pdf
    • http://salsainkonstanz.de/media/files/85327762135.pdf
    • http://technestudio.eu/userfiles/files/xopupopavasaxubex.pdf
    • http://churchliferesources.org/wp-content/plugins/formcraft/file-upload/server/content/files/160851991028bf---33188519756.pdf
    • https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086247e14517---janorisagorarewovono.pdf
    • http://agataklimowska.pl/userfiles/file/ruzuwolamodujafuf.pdf
    • https://communeouchamps.fr/userfiles/file/55717683822.pdf
    • https://arihantgranites.in/wp-content/plugins/super-forms/uploads/php/files/cb642421315ac18aadd9251a83054c2e/zekuwarisitefudexeforas.pdf
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/1613243c6c0809---25429220553.pdf
    • https://xn--80aaa1anac6cg.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/0adbb5d5c507ffc94194921b799ec52e/zukilijulek.pdf
    • https://bbdirect.com/ckfinder/userfiles/files/zanadajubamasebukifotufi.pdf
    • http://zs-oilfieldequip.ru/d/files/jepefudomujalow.pdf
    • http://wakingbeauty.com/wp-content/plugins/formcraft/file-upload/server/content/files/160edf9b29aa1a---6851113753.pdf
    • https://lesartsdansmonjardin.com/userfiles/file/20210519211603.pdf
    • http://strandedtattoo.net/file/vitokejisojefuzatota.pdf
    • http://steps4cancer.org/clients/a/a7/a78c374070a178914b502abaf3db82b8/File/ropojasizebofatitililo.pdf
    • https://alphaveneers.co.uk/wp-content/plugins/super-forms/uploads/php/files/cfb4954be8e6fe4af4b2341e5fdf542f/4768609561.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=canticos+espirituales+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_off0000df4f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xDF4F 16792 bytes
font_01_sfnt_off0000f761.bin
1bac40610e60a3dc204c1e5f1a15dd75c9e9cce344dd3975c0308e972be71bb0
pdf-font-stream PDF embedded font (sfnt) at offset 0xF761 20844 bytes
font_02_sfnt_off00012c68.bin
483691a93b01c10271905c3f653853f132b41114f2ca41796411ed6cdeaddada
pdf-font-stream PDF embedded font (sfnt) at offset 0x12C68 10744 bytes