Malicious PDF — malware analysis report

Static analysis result for SHA-256 2965577dbbe52490…

MALICIOUS

PDF

82.0 KB Created: 2021-09-06 18:00:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 89ec7e741d89b1d965a0e626bff43e1f SHA-1: ba8226d0f858c7e88d4f99848bb214f3d8683c84 SHA-256: 2965577dbbe5249067a3b60c3ee6233ddaba6ec743af6393c567dc30a7c771eb
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, a common technique for executing malicious code within documents. It also features a link farm pointing to various domains, some of which are hosted on compromised CMS uploads, suggesting an attempt to obscure the final destination or leverage trusted domains. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://futurefacesmiami.com/uploads/file/delurowewu.pdf In PDF document text
    • http://francescasciortino.it/userfiles/files/86246150102.pdfIn PDF document text
    • https://mediaget.ru/userfiles/files/buzadogowerenupasep.pdfIn PDF document text
    • http://dnepropress.net/files/file/zogefevodidimitomisotofa.pdfIn PDF document text
    • http://mamam.by/upload/File/file/bupajowerekefekinesag.pdfIn PDF document text
    • https://drivingschoolofnorthtexas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d2aad0de8ab---xojifememujowebuweb.pdfIn PDF document text
    • https://www.cdscabling.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609cc80a515c7---43696125713.pdfIn PDF document text
    • http://thermcom.cz/userfiles/file/kigokavipoxifaraxe.pdfIn PDF document text
    • https://shinko-tw.com/UserFiles/file/8950469161.pdfIn PDF document text
    • http://hockeydh.com/files/ups/files/favifegud.pdfIn PDF document text
    • https://brawlcall.com/ckfinder/userfiles/files/87483170270.pdfIn PDF document text
    • https://discovery99.com/userfiles/file/77358325882.pdfIn PDF document text
    • http://cjandjunemillerfarm.com/clients/75830/File/dobiwivezepanavunesikaz.pdfIn PDF document text
    • https://presstone.hu/userfiles/file/47653913306.pdfIn PDF document text
    • https://tpk-m.ru/files/file/darasawotafa.pdfIn PDF document text
    • http://erex.hu/upload/file/fopetevenavotame.pdfIn PDF document text
    • http://stylist.in.ua/wp-content/plugins/formcraft/file-upload/server/content/files/16077328652da2---79972935266.pdfIn PDF document text
    • https://a1-recruitment.fr/v2011/Files/fck_upload/file/49834157906.pdfIn PDF document text
    • http://burningspearmarketplace.com/js/ckfinder/userfiles/files/jilugozodowoxemumemupomi.pdfIn PDF document text
    • http://rapet.hu/files/fanuli.pdfIn PDF document text
    • http://kursadowicz.pl/Upload/file/mozixenuwewalawapezix.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=arduino+duemilanove+datasheet+pdfPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d973.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD973 18372 bytes
SHA-256: 41c121056efe7dd79f5d451b0bc9983f72bd6d20f72fe105339bd43e1dc45c88
font_01_sfnt_off0001095b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1095B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012172.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12172 10908 bytes
SHA-256: f949c7aa5b66e906b27cd6664f9ec693d2b9cf2cc216d403e054a83048ecd357