Malicious PDF — malware analysis report

Static analysis result for SHA-256 1219522b1b552d03…

MALICIOUS

PDF

86.5 KB Created: 2021-09-16 12:53:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 1bbde313fc81ae1e6e4e295250b35f1e SHA-1: 648c97a044ffb666fe407b5109b665093f4778e6 SHA-256: 1219522b1b552d034ac922547e45a490372dfd724b2e3114f8bec4609f45dcdd
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous external URIs and is identified as a link farm, with several URLs pointing to compromised CMS uploads or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery. No scripts were extracted, but the document structure and URLs suggest an attempt to lure users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://catamma.ru/uplcv?utm_term=jurassic+world+fallen+kingdom+putlocker PDF link annotation
    • http://ropesadventure.com/d/files/gizebepa.pdfIn PDF document text
    • http://noospc.ru/SITE/files/editor/file/34244045782.pdfIn PDF document text
    • http://odumakus.com/uploads/files/66561195656.pdfIn PDF document text
    • http://productinfo.in/konadnew/userfiles/file/14488411782.pdfIn PDF document text
    • https://gangwontaxi.com/FileData/ckfinder/files/20210910_2ABDCE1D9553C490.pdfIn PDF document text
    • http://bangladeshceramicsociety.com/uploads/editor/files/refopevupuvivebokedenow.pdfIn PDF document text
    • http://matkinhantai.com/luutru/files/kesifeto.pdfIn PDF document text
    • http://ecofincas.net/ckfinder/userfiles/files/kijusimewusixonamafupege.pdfIn PDF document text
    • http://dobryremont.pl/ebobas/portal/app/webroot/img/tmp/file/1631723804583.pdfIn PDF document text
    • http://www.valathors.com/ckfinder/userfiles/files/8499934594.pdfIn PDF document text
    • http://maudchristan.nl/ckfinder/userfiles/files/bakun.pdfIn PDF document text
    • http://fuzoku-kyujin.jp/ckfinder/userfiles/files/lebutosenom.pdfIn PDF document text
    • http://leylatoprak.com/userfiles/file/paxevuk.pdfIn PDF document text
    • https://eledigitalpr.it/allegati/file/tadajewije.pdfIn PDF document text
    • http://www.kidnuri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a18f303dd6---mubajuvafujodamusoxuju.pdfIn PDF document text
    • http://gwardiajuvenia.pl/zdjecia/fck/file/parubafew.pdfIn PDF document text
    • https://sakura-bashi.com/uploads/files/202109120608276644.pdfIn PDF document text
    • http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138034aeb9a3---favunolufevogiwitike.pdfIn PDF document text
    • http://antansconstructions.com/ckfinder/userfiles/files/54657277101.pdfIn PDF document text
    • https://www.cir.cloud/wp-content/plugins/formcraft/file-upload/server/content/files/16141ab5125809---94092845873.pdfIn PDF document text
    • https://milsagliksen.org/upload/ckfinder/files/50594656917.pdfIn PDF document text
    • https://tcufroghouses.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134164e1eeed---votosetajefusurufifatek.pdfIn PDF document text
    • https://pirkitpadangas.lt/ckfinder/userfiles/files/76799670375.pdfIn PDF document text
    • https://santaclara.com/wysiwygfiles/file/majad.pdfIn PDF document text
    • https://www.hkha.org/ckfinder/userfiles/files/22398472423.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_off0000ea9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA9F 18180 bytes
SHA-256: b6d6c32a306b3ac344c7c59bdf0c46878a166b8295734769e4d83fa80a62e345
font_01_sfnt_off00011a2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A2F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013246.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13246 11232 bytes
SHA-256: c1153fe2c2ddd06c0eaf30b28889075fbe0492cd5eae2bec88e74d19faad7e51

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