Malicious PDF — malware analysis report

Static analysis result for SHA-256 d990c07994456996…

MALICIOUS

PDF

78.5 KB Created: 2021-06-26 13:02:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 0a9437cdfeb3c405cbfd9015d08b6cd6 SHA-1: ae1b0eeb0a20ce67fee35aa3259896e12f2d50ee SHA-256: d990c079944569960a30e02ca942ee1428c869de2048610b2f9a23a2f4ff44ef
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many hosted on compromised WordPress sites or disposable domains, suggesting a link farm designed to redirect users to malicious content or phishing pages. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a common phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9958

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://drafthe.ru/uplcv?utm_term=mass+and+volume+worksheet
    • http://unipsyclinic.com/userfiles/file/20210518023750.pdf
    • https://canionglobal.com/FCKeditor/file/75013547971.pdf
    • http://www.look4job.gr/images/_user_na/file/jajajigifatufije.pdf
    • https://indacphuc.com/wp-content/plugins/super-forms/uploads/php/files/oittaqk7aodrskvdkdh2lco7dv/pojenefodorakevepolatabob.pdf
    • https://www.pennlighting.com/wp-content/plugins/super-forms/uploads/php/files/fd2481306913271fa0c26c85cc63ac74/57402277812.pdf
    • http://netinflux.net/userfiles/file/wadimavunaxagekapowan.pdf
    • http://mirrorgallery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ed03247ef1---54461836899.pdf
    • http://camberwelltaxi.com/survey/userfiles/files/jivuduwev.pdf
    • http://themultifold.com/wp-content/plugins/super-forms/uploads/php/files/i3l7imrbm2ni0ahp39q6m42go5/74478685639.pdf
    • https://www.alpha-dynamics.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160745af843cd6---toriponi.pdf
    • https://www.davidcosz.de/wp-content/plugins/super-forms/uploads/php/files/dvfe16relfq2hptd7cbe3980m1/85768779173.pdf
    • https://www.areatransfers.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077b6b0030b5---sajawesiwemuwimupari.pdf
    • https://hostingalani.com/calisma2/files/uploads/turexu.pdf
    • https://olmitek.by/wp-content/plugins/super-forms/uploads/php/files/u9meonrp1jns0vhnbu3kohg6s7/28406373118.pdf
    • http://www.trimbleexpress.sk/wp-content/plugins/formcraft/file-upload/server/content/files/160887e3b0a55a---xavawevudafigilotaxawoxuj.pdf
    • https://www.temsilcisitesi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094793150b06---puxakor.pdf
    • https://hps-gruppe.com/wp-content/plugins/super-forms/uploads/php/files/65p65j8ripggfl24l6vpndbadv/32850266709.pdf
    • http://volamtuyetthe.com/userfiles/file/xexuxuzuriputaf.pdf
    • https://tramtron.vn/uploads/files/files/37457968174.pdf
    • https://tecsal.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160ad7b3120185---fumuxusumibejaxikigiso.pdf
    • http://otczenacts.com/media/files/51632805453.pdf
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/99b770bd09659c9e52f4017955f6723f/jidufagitiximaxulelaz.pdf
    • http://www.elitagida.com.tr/wp-content/plugins/super-forms/uploads/php/files/5qrs4ia8j73c84r5jmsr5ikut5/wapoxetafe.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_off0000cfa2.bin
db035134ace2c52642db8361802e04f54d4a3a875844e61d8ce0e59486041d4e
pdf-font-stream PDF embedded font (sfnt) at offset 0xCFA2 16516 bytes
font_01_sfnt_off0000fa7c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xFA7C 16792 bytes
font_02_sfnt_off00011293.bin
866f184527e0923e927b0fe09446fe759dcc08a9317cbe6caaceac6840f61a90
pdf-font-stream PDF embedded font (sfnt) at offset 0x11293 10760 bytes