Malicious PDF — malware analysis report

Static analysis result for SHA-256 f230c12c82bd2166…

MALICIOUS

PDF

89.0 KB Created: 2021-09-23 10:58:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 10bb5ae3395c45a91f5f4719b298a308 SHA-1: eaa60ea5aa53db116092498248f286c98e2182c9 SHA-256: f230c12c82bd2166515c0ebf17380f2a2ab7dbece395f0481b5f29f23a1c9cbb
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics reveal it functions as a link farm, directing users to multiple external URLs, some hosted on compromised CMS platforms. The PDF's structure and embedded links suggest it is designed to trick users into visiting these sites, potentially for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://garglob.ru/uplcv?utm_term=best+naruto+offline+games+for+android PDF link annotation
    • https://gujaratisamajparis.org/upload/files/75449109554.pdfIn PDF document text
    • http://uk-finansist.ru/userfiles/file/wotevuwuxuditubanoxaw.pdfIn PDF document text
    • https://nam.it/wp-content/plugins/formcraft/file-upload/server/content/files/1613291aa2ec65---33653763070.pdfIn PDF document text
    • http://lexen.ca/userfiles/files/dolodanegebivesetol.pdfIn PDF document text
    • http://xn----ctbguteehkho5h.xn--p1ai/ckfinder/userfiles/files/43800775779.pdfIn PDF document text
    • https://balajihighfields.in/userfiles/file/lototuliv.pdfIn PDF document text
    • http://streathamtaxi.com/survey/userfiles/files/bimosinirisokajo.pdfIn PDF document text
    • http://bigyikesmedia.com/home/xtremweb/public_html/consultinstitute/web/upload/files/guremutoloretos.pdfIn PDF document text
    • http://gt-outillages.fr/ressource/site-image/files/10894298490.pdfIn PDF document text
    • http://eunlocker.com/Images/Editor/file/namimo.pdfIn PDF document text
    • http://gachtrangtritranvinhtin.com/gachtrangtritranvinhtin/Images_upload/files/xejali.pdfIn PDF document text
    • http://tiszaladany.hu/upload/file/tikopabapivapupixixip.pdfIn PDF document text
    • http://3gr-group.com/ci/userfiles/files/soduf.pdfIn PDF document text
    • http://islenapuntos.com/campannas/file/2247308863.pdfIn PDF document text
    • http://rulada.by/upload/editor/files/verixubeveri.pdfIn PDF document text
    • http://hongphuc.vn/userfiles/file/49743725801.pdfIn PDF document text
    • http://bagliodeimille.it/userfiles/files/641286953.pdfIn PDF document text
    • http://ziepniekkalns.lv/wp-content/plugins/formcraft/file-upload/server/content/files/1614484cba66d2---lavotoji.pdfIn PDF document text
    • http://witnesstherealist.com/wp-content/plugins/super-forms/uploads/php/files/cc3c772c78342df21cc32e845e3142dd/sanafizanixovovi.pdfIn PDF document text
    • http://hzosm.com/images/upload/File/78962426727.pdfIn PDF document text
    • https://maxlinder.com/admin/assets/ckfinder/userfiles/files/97364135951.pdfIn PDF document text
    • https://baoyi-chuck.com/ckfinder/userfiles/files/15594951653.pdfIn PDF document text
    • https://homeaestheticsllc.com/wp-content/plugins/super-forms/uploads/php/files/c63c1d534c29567cbf364a6eccc60eb9/vabepimolivafemabidedaza.pdfIn PDF document text
    • https://www.oasipizza.it/wp-content/plugins/formcraft/file-upload/server/content/files/16143970cc89e3---35817469733.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_off0000f886.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF886 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011098.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11098 17116 bytes
SHA-256: 28532027130f605487ff85aee87aa8c0eb0534cb1ccdabd2e24358066b76d952
font_02_sfnt_off00013cfa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13CFA 10848 bytes
SHA-256: 4a7136b3d476bc513746723b3d60c881d4a6013fb25873f4250f7bbc21cad69d

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