Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff26675a938b5b41…

MALICIOUS

PDF

77.8 KB Created: 2021-06-28 04:46:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 1447e49daabe1c8fa752cad53ebc7296 SHA-1: 3907a7b41d4ae1a1b1b9b3122910a46ed5d8e8e7 SHA-256: ff26675a938b5b411f4dece94bc002886667facf6ea41add7cf8b186658876cc
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or distributing further malware. No scripts were extracted, but the primary attack pattern involves luring users through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://wastran.ru/uplcv?utm_term=steppenwolf+ride+with+me
    • https://www.cocochan.com.pk/wp-content/plugins/super-forms/uploads/php/files/6555be0b2b884632f8331fe7916b1f23/sosuzewewiwa.pdf
    • http://nfrostov.ru/upload/files/fibavufarudubazitizurig.pdf
    • http://aleeblog.com/wp-content/plugins/super-forms/uploads/php/files/fk49gakir8ks0u14nedu4g4f33/rijur.pdf
    • http://argra.rs/wp-content/plugins/formcraft/file-upload/server/content/files/16084b782cde3b---furabupabizimojopew.pdf
    • http://techbico.vn/uploads/image/files/nekamutugitepomiwinapup.pdf
    • https://choiceenergynetwork.com/wp-content/plugins/super-forms/uploads/php/files/3374747c62f4e38c845f136636ec8c11/zoduvakaselusonuke.pdf
    • http://aven.su/userfiles/file/29936470143.pdf
    • https://dtcprojects.com.au/wp-content/plugins/super-forms/uploads/php/files/lp9bohk89ngmf3h4460j9ktihf/xiwukiremelaf.pdf
    • https://ukdirectremovals.com/wp-content/plugins/super-forms/uploads/php/files/a2e1cf04adf5035057b4e423a89efb84/jajiwizabekutimik.pdf
    • https://plentis.eu/ckfinder/userfiles/files/81509061288.pdf
    • https://elicopter-de-inchiriat.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160b28de2dcc92---41577524030.pdf
    • https://islandsvefir.is/wp-content/plugins/super-forms/uploads/php/files/u3m0ab2isujgrvr472mkj3lrmp/pururigenalulaguxovoludof.pdf
    • https://www.lashharmony.co.uk/wp-content/plugins/super-forms/uploads/php/files/rldogirt18b6ak8p1n4f1fe3dt/14630895956.pdf
    • http://veraschwemmle.de/fckdata/file/5039922721.pdf
    • http://www.holzbau-hoelzl.at/wp-content/plugins/formcraft/file-upload/server/content/files/1607cfe6b9c0f7---13198723718.pdf
    • http://www.tenniscanberra.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c9afcdd2748---25748556245.pdf
    • http://exactblue.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cf8dcde188d---40501818220.pdf
    • http://sonsuadogo.org/Images_upload/files/52594221040.pdf
    • http://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160867b0b59267---vebezanegobevolipazewib.pdf
    • https://gresathouse.com/wp-content/plugins/super-forms/uploads/php/files/0ad8cac28d76645dba82811812fb5899/79012108627.pdf
    • https://www.medipratik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fdee0b92b0---jukiwalijamariv.pdf
    • https://canadiancontractorservices.com/wp-content/plugins/super-forms/uploads/php/files/nn85atk5s7q1m9tc7q2aiuqg73/20193250607.pdf
    • http://nuestratierrapremios.com/campannas/file/wawukomutamavenoraruropil.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_off0000cc23.bin
38587bbd19db2fc05b54347d80a5d09efadb6c56031bff1ae772830b98a3bc21		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCC23 10596 bytes
font_01_sfnt_off0000e421.bin
8bc7f66dc3d91538c41981ffb938754dcc31dc712cd6339dcc7da9b4cb2bc2a7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE421 17320 bytes
font_02_sfnt_off000111e7.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x111E7 16792 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.