Malicious PDF — malware analysis report

Static analysis result for SHA-256 72668058fce7a726…

MALICIOUS

PDF

85.2 KB Created: 2021-07-21 11:37:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: aaaab7731df3f7665b99229c61ea06d9 SHA-1: 41397723011d11a264f3aa59eea8c283cec4b0f1 SHA-256: 72668058fce7a726c3da07c495c96ecd3c34917ee52e56efee6c995012ec9ee6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded URLs, many of which point to compromised websites or are part of link farms designed to obscure the final destination. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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 http://morethancars.nl/uploads/edytor/file/zewinimeledefigeju.pdf In PDF document text
    • http://industrialdevices.in/uploads/ranalibodiwafafelisezi.pdfIn PDF document text
    • https://fellowpeo.com/wp-content/plugins/super-forms/uploads/php/files/75f7729153bd84249eead30c463480ad/98383032565.pdfIn PDF document text
    • http://sklepjola.pl/userfiles/file/91225005097.pdfIn PDF document text
    • http://deurenhanger.nl/userfiles/file/72803191079.pdfIn PDF document text
    • http://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160bbf32a9940a---93160875704.pdfIn PDF document text
    • https://www.indee-r.fr/wp-content/plugins/super-forms/uploads/php/files/80e4ac7543714d9b0123817e168b8379/8990133713.pdfIn PDF document text
    • https://alteanetworks.fr/img/file/nobafulolukubesero.pdfIn PDF document text
    • http://www.adatechotomasyon.net/wp-content/plugins/formcraft/file-upload/server/content/files/16083dbdacf0f6---89885236841.pdfIn PDF document text
    • https://eclipsetheaters.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086c0664bfa9---pififotef.pdfIn PDF document text
    • http://jevades.com/aircraft/fckimages/file/45014280223.pdfIn PDF document text
    • https://drmiamiconnect.com/wp-content/plugins/super-forms/uploads/php/files/08403dc01e7572f25e92f301b98a662f/bovaguja.pdfIn PDF document text
    • https://fjordancv.info/wp-content/plugins/super-forms/uploads/php/files/67d813adf6481d8cac9859b57b4be220/lopajugisokix.pdfIn PDF document text
    • https://cashofferoregon.com/wp-content/plugins/formcraft/file-upload/server/content/files/160962395c2158---madumekiwumazo.pdfIn PDF document text
    • http://www.hollyskauaicondo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5546778c6d---vemifozotatuferef.pdfIn PDF document text
    • https://www.getfitcrew.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084b7cd33c51---nivutav.pdfIn PDF document text
    • http://www.radiopopiatej.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078ae78c9e94---35185390329.pdfIn PDF document text
    • http://arniestribu.com/campannas/file/45723841920.pdfIn PDF document text
    • https://www.geosuiteonline.de/wp-content/plugins/formcraft/file-upload/server/content/files/160808ba8d6099---25977460348.pdfIn PDF document text
    • http://comp-art.ru/userfiles/file/sugowozeb.pdfIn PDF document text
    • http://aep-tc.com/cache/fck_files/file/kusedamepitodokosiw.pdfIn PDF document text
    • http://fipjp.com/userfiles/file/342089657.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=how+to+write+exponential+equation+from+graphPDF 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_off0000e8c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8C8 11064 bytes
SHA-256: 88e651f98eb7f4f577f39ef92a7549823b516252ba898ef55515db0ac2e9b502
font_01_sfnt_off000101fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101FE 17288 bytes
SHA-256: 91bc7f3334c3cd4892ffc9c049f81782a0d5492e09e71f94bc1f9d8419a8e01b
font_02_sfnt_off00012f59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F59 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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