Malicious PDF — malware analysis report

Static analysis result for SHA-256 89f4e3a786d4022e…

MALICIOUS

PDF

82.1 KB Created: 2021-09-03 20:29:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 45db9a767c16dca6e2edacc90a3e4b8f SHA-1: 314321c8457bf86ca9a3aa3dbc1032fbba509882 SHA-256: 89f4e3a786d4022e498a9597d4817fe1b0632a388d3ad3616ebf0f099ef08ac2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains numerous links, many hosted on compromised WordPress sites, designed to trick users into downloading further malicious content. The presence of external URIs and link farms suggests an attempt to distribute malware or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://huntic.ru/uplcv?utm_term=google+chrome+os+pdf+free+download PDF link annotation
    • https://www.popcaffe.it/wp-content/plugins/super-forms/uploads/php/files/59bae48fad8bd1849b73bf8be2ab2cdd/zokexugezexapesesuraluf.pdfIn PDF document text
    • http://kadh.kr/bobod/upload/file/bisifasojuwaze.pdfIn PDF document text
    • http://studiomontironi.eu/userfiles/files/bogosujotoru.pdfIn PDF document text
    • http://phukiendoxe.com/media/ftp/file/kidunitetibed.pdfIn PDF document text
    • https://www.baileysmilk.com/wp-content/plugins/super-forms/uploads/php/files/7cc5751ec8ca511ac27ca19fbf8b5579/zilakapusegewitizati.pdfIn PDF document text
    • http://ibrahimalsada.com/pics/file/2054237946.pdfIn PDF document text
    • http://www.reroofingbrisbaneqld.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a835c661ff0---81629832629.pdfIn PDF document text
    • http://tareeapartment.com/user_img/files/61733035941.pdfIn PDF document text
    • https://ddriu.hu/wp-content/plugins/super-forms/uploads/php/files/77c49ee2b0b985728e2b063b47a7f6f0/girapopavo.pdfIn PDF document text
    • http://www.k-24.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087e9b8aeab9---73994055785.pdfIn PDF document text
    • http://wawabed.pl/uploads/userfiles/file/41022388129.pdfIn PDF document text
    • https://canvasations.com/wp-content/plugins/super-forms/uploads/php/files/1uss914acj6hl3uiaof0at5gn7/84258689580.pdfIn PDF document text
    • http://www.dfdtrading.sk/ckfinder/userfiles/files/ketolewepagukinesivuz.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160728a9a1331f---51437241554.pdfIn PDF document text
    • https://pima-alarms.rs/slicice/file/mabubepigabevi.pdfIn PDF document text
    • https://orsam.org.tr/paketler/ckfinder/dosyalar/files/9671529508.pdfIn PDF document text
    • http://mirembeestate.co.ug/wp-content/plugins/formcraft/file-upload/server/content/files/160d305c19a900---67832939644.pdfIn PDF document text
    • https://frasertechno.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f185c37dd3---15373321574.pdfIn PDF document text
    • http://ct-tci.com/cttax/userfiles/files/45995102911.pdfIn PDF document text
    • https://franchiseharbor.com/files/files/tarovokozogovavoxe.pdfIn PDF document text
    • https://firsatoyun.com/calisma2/files/uploads/98781084690.pdfIn PDF document text
    • http://fairway.cc/images/blog//file/58351254979.pdfIn PDF document text
    • https://nhuadailoan.vn/upload/userfiles/files/78385249034.pdfIn PDF document text
    • https://reparation-mobile.net/userfiles/file/kozoxeru.pdfIn PDF document text
    • http://criminisiepartners.it/userfiles/files/31526729837.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_off0000dd07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD07 16908 bytes
SHA-256: 521737f2865555e52e10b6a3a629b6d2daaf3f5d51301dc19ade6fb2c382f84a
font_01_sfnt_off000108fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108FC 11004 bytes
SHA-256: 431d7258893152a91078771704ee0be22810f4f31d85b5f9ce252649c8ece4d3
font_02_sfnt_off00012244.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12244 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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