Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b2aaa98ead6501b…

MALICIOUS

PDF

204.1 KB Created: 2021-07-07 02:52:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 134a6393a6012ba7861b3a3a3b810afd SHA-1: 5e6183d2b7ec233207bd640ae1f2d713fc99d4f7 SHA-256: 7b2aaa98ead6501b3cfb8ce8bdf496591e3e925e84306a1be3ae261d25b01e13
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple external URIs and a link farm pointing to compromised WordPress upload storage, indicating a phishing lure. The presence of PDF_SEO_UTM_REDIRECTOR_LINK heuristics suggests the document is designed to redirect users to malicious content, likely for credential harvesting or malware distribution. ClamAV detection further confirms its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9800

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
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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.
  • 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://catamma.ru/uplcv?utm_term=wow+affliction+warlock+pve PDF link annotation
    • https://infoenergie-loire.org/userfiles/file/29038242700.pdfIn PDF document text
    • https://semineebrasov.ro/printuri-fi/files/6572479434.pdfIn PDF document text
    • https://arte-salon.ru/upload_picture/87781932165.pdfIn PDF document text
    • https://www.nobleorthodontic.com/wp-content/plugins/super-forms/uploads/php/files/55e9b7176488d0b9da135c1d5c9a7d78/14593909113.pdfIn PDF document text
    • https://worldkelo.com/wp-content/plugins/super-forms/uploads/php/files/4e15ab27cee1464cac35a343eb2bd897/wibebowelupovawule.pdfIn PDF document text
    • https://ewt.cz/res/file/fuganegigufadobuw.pdfIn PDF document text
    • https://bodegoncriollo.com/userfiles/file/kadazuposedu.pdfIn PDF document text
    • http://grafiport.com/userfiles/file/pijiwudi.pdfIn PDF document text
    • https://www.fecomerciomg.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607f31fc48554---15900460551.pdfIn PDF document text
    • http://acetuitioncentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160d46a005d894---44833886052.pdfIn PDF document text
    • http://saludocupacionalpso.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/1607d9f7ba7032---20480879001.pdfIn PDF document text
    • https://studio45.live/wp-content/plugins/super-forms/uploads/php/files/trok8socaprk9bprg7po6a7rkl/21893807476.pdfIn PDF document text
    • http://orem.mn/uploads/files/21206036737.pdfIn PDF document text
    • https://www.chortho.co.uk/wp-content/plugins/super-forms/uploads/php/files/d2vmf9cgah5g502ren4fh15kaj/9494429151.pdfIn PDF document text
    • http://call.ae/wp-content/plugins/formcraft/file-upload/server/content/files/16079063dda841---mekakupuxixefuvoto.pdfIn PDF document text
    • https://zazilha.com.mx/wp-content/plugins/super-forms/uploads/php/files/0ca45e1ee8df126b1e4f4c1b82e18421/womipajugejenu.pdfIn PDF document text
    • https://extremetour74.ru/wp-content/plugins/super-forms/uploads/php/files/f96fe0c38136ba562109224cca37de18/55610092770.pdfIn PDF document text
    • https://alismobile.co.uk/wp-content/plugins/super-forms/uploads/php/files/eb916703f4eb25161a94261db160ef8e/fumawaj.pdfIn PDF document text
    • https://cradlegold.com/wp-content/plugins/super-forms/uploads/php/files/187mghgpp1kkhrk9rco8pmn9en/zekegabog.pdfIn PDF document text
    • https://apoc.com.au/wp-content/plugins/super-forms/uploads/php/files/d01fa55fd52cb5f430802af546a28e1a/nipujimeripukojodumu.pdfIn PDF document text
    • https://sckstone.com/wp-content/plugins/super-forms/uploads/php/files/d1f1be7414f65cf6d349e71eec3efa70/4785345344.pdfIn PDF document text
    • http://vienkiemis.lt/app/webroot/uploads/userfiles/files/15433415532.pdfIn PDF document text
    • http://amandatravel.com/userfiles/file/keleromiteduravonow.pdfIn PDF document text
    • http://dragonera.cn/admin/userfiles/file/67114242835.pdfIn PDF document text
    • 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_off0002c001.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2C001 18168 bytes
SHA-256: 8aa703888c4da789baaa4f3d58be92cbbdc64be55008ca3d920077e2479c01ff
font_01_sfnt_off0002f05a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F05A 10540 bytes
SHA-256: b45427542e7bf0cd8abea5fed932b661c78a2d2f0bb41e84eca279dc9e056c3b
font_02_sfnt_off00030895.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30895 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1