Malicious PDF — malware analysis report

Static analysis result for SHA-256 62b0332bf37d3e52…

MALICIOUS

PDF

90.2 KB Created: 2021-08-11 01:43:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 2213e9a5183c754edbe237b96ae9d31e SHA-1: 57b79bf9b26b60fb8a6c892dc421ddd0d4161942 SHA-256: 62b0332bf37d3e52d81d77d890a1e4ec0c807d57178f057e8146dc40d8dfbf85
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised CMS upload directories or disposable hosting, indicating a link farm designed for malicious redirection. The ClamAV detection and ML classifier strongly suggest a phishing or trojan payload delivery. Although no scripts were explicitly extracted, the nature of the URLs and the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic point towards an attempt to lure users to malicious sites, likely as part of a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://pixomot.ru/uplcv?utm_term=draw+cartoons+2+ios PDF link annotation
    • http://satisfytech.com/ck/upload/files/57963983608.pdfIn PDF document text
    • http://vrajacreation.com/uploaded_files/userfiles/files/96674212292.pdfIn PDF document text
    • http://pvsystreports.com/wp-content/plugins/super-forms/uploads/php/files/hgd3ddmfgpva8bqlqjqc3u3bn1/kifexixiwoxe.pdfIn PDF document text
    • https://thebillionbottom.com/business_school/uploads/file/dorenowiwukajokuxokenasa.pdfIn PDF document text
    • https://willmarareachamber.com/ckfinder/userfiles/files/fonawi.pdfIn PDF document text
    • http://starrwindow.com/clients/863399/File/luxuvikufofu.pdfIn PDF document text
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/prte4s48fb5hejn4qmvejf7c5b/97123619991.pdfIn PDF document text
    • http://gildiamasterov.ru/userfiles/file/47551018856.pdfIn PDF document text
    • http://clinicaveterinariabilancino.it/userfiles/files/90313734058.pdfIn PDF document text
    • https://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f4b983ae30---97308645212.pdfIn PDF document text
    • https://joyfool.art/wp-content/plugins/super-forms/uploads/php/files/fd134e9d1c294e87625aa488808747be/feziz.pdfIn PDF document text
    • http://www.jcca.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/160bd013bc1b59---70683639348.pdfIn PDF document text
    • http://highendschmiede.de/highendfiles/file/68604264691.pdfIn PDF document text
    • https://audit-advisers.com/userfiles/file/91543098959.pdfIn PDF document text
    • http://northphoenixmustangs66.com/clients/4/4b/4b49b54eec06ebba3741256e9f3e6f2b/File/rokok.pdfIn PDF document text
    • https://www.prestigeautobody.com.au/wp-content/plugins/super-forms/uploads/php/files/951931f8eb110ff6ff53da217c0c064e/25373976444.pdfIn PDF document text
    • https://balaji-technology.com/userfiles/file/43256621552.pdfIn PDF document text
    • http://www.gaviprintpack.com/wp-content/plugins/formcraft/file-upload/server/content/files/160774f8212926---46278939462.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/7eefd77aefb5186f356da5c817177b2c/nukavogexaravilejakeduxav.pdfIn PDF document text
    • http://iaestedresden.de/userfiles/file/17880234122.pdfIn PDF document text
    • http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f1c3826df6---19259896338.pdfIn PDF document text
    • http://aci-immobilier-douai.fr/userfiles/files/71402415318.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
font_00_sfnt_off0000e40a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE40A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fc21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC21 10252 bytes
SHA-256: 5208972befebfe745eb9869ace73287e195024506c3b4ba1f7d9b0fba5caa9a9
font_02_sfnt_off0001136f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1136F 19508 bytes
SHA-256: 55efe880529d84d60a97f511208bf206da8eccef2cf867bbf475f896400b47fc
font_03_sfnt_off00014517.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14517 16092 bytes
SHA-256: 9d5144547e0b729630886a3ad3ce48e7da84b0115899dd9c2390406af6f0fecd

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