Malicious PDF — malware analysis report

Static analysis result for SHA-256 dcee12e81e7ccd27…

MALICIOUS

PDF

68.9 KB Created: 2021-06-19 18:58:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 79786f2bc8941b14c8d57c7406e8f27e SHA-1: 277b9104d45ff455e721af5bdcc2d522de23d6f6 SHA-256: dcee12e81e7ccd27f5663efea3f1f92faea6bba9fde407f8aa018c540b8af580
156 Risk Score

Malware Insights

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

The PDF contains numerous links to disposable hosting sites, disguised with a movie title lure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://laborke.ru/uplcv?utm_term=johnny+english+full+movie+in+tamil PDF link annotation
    • http://www.auditsi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082574aa8678---49579450742.pdfIn PDF document text
    • https://abril.pe/wp-content/plugins/super-forms/uploads/php/files/fd2421df2472r2okmavpgsp69t/48331046347.pdfIn PDF document text
    • http://grani-tonkogo-mira.ru/wp-content/plugins/super-forms/uploads/php/files/2c3716fce657054535b42681aa004aee/pemonevobipowi.pdfIn PDF document text
    • http://benthanhsgfarm.com/images/uploads/files/95949979708.pdfIn PDF document text
    • https://howardsteeves.com/wp-content/plugins/super-forms/uploads/php/files/b514904877aa25576f96aab5b166b87a/69501334394.pdfIn PDF document text
    • http://albatrossmrn.com/konadnew/userfiles/file/86349720702.pdfIn PDF document text
    • http://www.hptindia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160951364178c1---23563352199.pdfIn PDF document text
    • https://www.baptistenhardenberg.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b55b41430a6---wumotidifozubuvexox.pdfIn PDF document text
    • https://www.endthestigmacounselling.com/wp-content/plugins/super-forms/uploads/php/files/2h7mhgvsjqvrhvcs67t6ukv8r4/83045269581.pdfIn PDF document text
    • https://traveltokiev.com/wp-content/plugins/super-forms/uploads/php/files/14rnpjtomq16v1qh23sk2qd5c4/50093527225.pdfIn PDF document text
    • https://ceilford.org/wp-content/plugins/super-forms/uploads/php/files/c096742b25929e783f2b8e0d03325fd6/10033340735.pdfIn PDF document text
    • https://arte-salon.ru/upload_picture/potizeliwuxi.pdfIn PDF document text
    • https://aftaplan.com/works/peepsparty/html/upload_files/file/18749739283.pdfIn PDF document text
    • https://leicht-spb.ru/wp-content/plugins/super-forms/uploads/php/files/e4a580dc3fa166660e4c2dee431e511b/64073204558.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b42b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB42B 5236 bytes
SHA-256: d123d9579823acef04512b9e0719818ff6f6bc6ef74cb5f0acdd79f5822c664f
font_01_sfnt_off0000c5e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5E8 9912 bytes
SHA-256: f44a1db8b8e62428962fa78ffa86a5f36a378e166f99a267037e95a2e1417bb9
font_02_sfnt_off0000e111.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE111 10828 bytes
SHA-256: 0d4532d69db01186d72f1eaefb7195a4a379db7bd4c557e9c773fc4308b135e8