Malicious PDF — malware analysis report

Static analysis result for SHA-256 60252c6d4e3353c1…

MALICIOUS

PDF

76.6 KB Created: 2021-06-13 21:13:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: a7fa5a54cf2cfb96d5397055aefff47f SHA-1: e1d9868b0097423d3602442ab4fefccfbf02c19e SHA-256: 60252c6d4e3353c1004de9e88d69f61659ce3e5e7885ddadaa16373383fa8c48
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to compromised websites or disposable domains, suggesting a link farm designed to lead users to malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://inwebjor.ru/uplcv?utm_term=panchatantra+kannada+movie PDF link annotation
    • http://www.annaleehuber.com/content_files/file/gapusumaxufuze.pdfIn PDF document text
    • https://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160766fa4431bf---93422958199.pdfIn PDF document text
    • https://kantankacreative.com/wp-content/plugins/super-forms/uploads/php/files/4d6858fd47a9ddf823fc04853edc5b49/vewadederapekebuwis.pdfIn PDF document text
    • https://www.hausbootgeiseltalsee.de/wp-content/plugins/super-forms/uploads/php/files/4u4s8rmn7o9e8a237lbq2tcp09/40662565421.pdfIn PDF document text
    • https://healthmatters.me/userfiles/file/95096518595.pdfIn PDF document text
    • https://chicagoportablexray.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098463f728b5---vumofusuxekajovokom.pdfIn PDF document text
    • https://kopari.hu/files/file/zibojovamugimosun.pdfIn PDF document text
    • https://propbrains.com/wp-content/plugins/super-forms/uploads/php/files/sreaq3lkf390r4bi8706lramn1/dufelenututiwavuvatasuzup.pdfIn PDF document text
    • http://www.canadiantreasurer.com/wp-content/plugins/formcraft/file-upload/server/content/files/160976e8174adb---susiparasurokekud.pdfIn PDF document text
    • http://fashioncenterpoint.com/wp-content/plugins/super-forms/uploads/php/files/b4b775221cc5c8c886de4b984fe1b928/bazezivifamoserip.pdfIn PDF document text
    • http://www.haztartasigepszakuzlet.hu/pics/file/47933746140.pdfIn PDF document text
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b95d7e93a9b---maxipekisowomige.pdfIn PDF document text
    • https://landi-bg.com/images/file/fuxupapolinifibavowirokip.pdfIn PDF document text
    • https://meganimal.pt/site/upload/file/pevumo.pdfIn PDF document text
    • https://ozmutludokum.com/userfiles/file/7366487377.pdfIn PDF document text
    • https://expresstestingatl.com/wp-content/plugins/super-forms/uploads/php/files/58f5e3686db97d79a310595d4d6b3e94/39590969055.pdfIn PDF document text
    • http://espacioschillout.es/images/admin/file/vusezupezakejojefexawu.pdfIn PDF document text
    • http://lohsclassof70.com/clients/3/31/31ca850ff086a58b81c8700e10a01852/File/21121489272.pdfIn PDF document text
    • https://www.lowdoc-loans.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16093c3d23e3c0---22285291149.pdfIn PDF document text
    • http://mictrogiang.com/userfiles/files/3417772967.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f03d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF03D 5096 bytes
SHA-256: e5d9377965b66c66a91bf1bf145ac4ca8fa0e33c8817bb7c66aa4a1821644d29
font_01_sfnt_off00010169.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10169 10416 bytes
SHA-256: 943f36f46fe6063dc843ca3e05c95eac205a7a435d7d32db1d63e63624c120b1