Malicious PDF — malware analysis report

Static analysis result for SHA-256 6fe732e5588dac46…

MALICIOUS

PDF

94.8 KB Created: 2021-07-14 09:06:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 8d9ec5d80ad88179eec28b211371096e SHA-1: 33e5a19f39977cc6f34900c0377e26b1707bfeb7 SHA-256: 6fe732e5588dac46cb3793d74e5a06ccbc58308181bb38bee81ffa24c24db8be
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript and a large number of external links, many of which point to compromised websites or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or SEO poisoning to redirect users to malicious content. The embedded JavaScript may be used to further obfuscate the malicious links or perform additional malicious actions.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9786

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://pixomot.ru/uplcv?utm_term=independent+power+plant PDF link annotation
    • http://stylist.in.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160d52256a5caa---75466541677.pdfIn PDF document text
    • http://andreagarciam.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bbd4f42ac67---pusefikuvul.pdfIn PDF document text
    • http://box8websites.com/ckfinder/userfiles/files/36093511475.pdfIn PDF document text
    • http://technoculture.cz/admin/upload/file/31175822136.pdfIn PDF document text
    • http://bbpcosmetics.com/admin/upFiles/2021-6/file/93293925340.pdfIn PDF document text
    • http://yulintimber.cn/d/files/pexumupadep.pdfIn PDF document text
    • http://cdmatik.com/uploads/file/keliwigitaxopurebif.pdfIn PDF document text
    • https://nscs.org/wp-content/plugins/super-forms/uploads/php/files/de7c8e6bb0921896cd1efbb119a28d94/9830378718.pdfIn PDF document text
    • https://www.dazzlingdecor.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1606d80a0ba069---rafigojonirikojunugilipe.pdfIn PDF document text
    • https://www.andimoda.com/wp-content/plugins/super-forms/uploads/php/files/c05075319e678f3f179526425aac4cb4/29404953743.pdfIn PDF document text
    • http://taxicityplus.ru/userfiles/file/xamalowuzitarari.pdfIn PDF document text
    • http://pck.malopolska.pl/wp-content/plugins/super-forms/uploads/php/files/f85b7d728d64a7baebfa50940a33e22a/parobu.pdfIn PDF document text
    • https://www.a2zmedical.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160ad865e9c648---19501390457.pdfIn PDF document text
    • http://18554080.com/userfiles/file/vanudugur.pdfIn PDF document text
    • http://www.kinoimaging.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a9f33ca6063---rovagagulotujusixat.pdfIn PDF document text
    • http://srlamn.com/clients/0/00/00e84243199fd86ca7c15d66a0237eb0/File/76900831875.pdfIn PDF document text
    • https://southtours.com/wp-content/plugins/super-forms/uploads/php/files/7on8bqidfjkkagre1s9aipmghk/bomezas.pdfIn PDF document text
    • http://timebymtm.com/upload/files/36145650416.pdfIn PDF document text
    • http://www.highlandmetals.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1608a01ae255e6---fuxirib.pdfIn PDF document text
    • https://contactfm.be/userfiles/files/9266607560.pdfIn PDF document text
    • https://weinquartier.at/wp-content/plugins/super-forms/uploads/php/files/06d9e1666f354014fd6ad70c268cf3ef/96050425176.pdfIn PDF document text
    • http://meyanko.com/userfiles/file///39297741716.pdfIn PDF document text
    • https://www.chortho.co.uk/wp-content/plugins/super-forms/uploads/php/files/phcst2hv26uip2binh7s667gvu/1355795202.pdfIn PDF document text
    • http://idolyokocho.com/js/ckfinder/userfiles/files/vimaboxirezalom.pdfIn PDF document text
    • https://www.infrascale.com/wp-content/plugins/super-forms/uploads/php/files/ccfe5e69e067ed8d8042061abe92e11f/zekasoralur.pdfIn PDF document text
    • http://s292376414.onlinehome.fr/datas/imgmail/file/detaxinofired.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00011f6c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x11F6C 18652 bytes
SHA-256: 45ac06160bacffdada801754bf2d9402b44729c8b65d238d21373229d12a9907
font_00_sfnt_off0000f082.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF082 10160 bytes
SHA-256: 89f86a6a1bb7634d33298bfaf3578ce9da0d21c9f0e8c44094365f7b23e72f37
font_01_sfnt_off0001075b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1075B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00013d6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D6D 17620 bytes
SHA-256: 93299efd43e7cc47fc7bd295adfafb1937f6ad13c871bdf8863ac743e1c20b0e

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