Malicious PDF — malware analysis report

Static analysis result for SHA-256 7674ed57a7e34510…

MALICIOUS

PDF

77.2 KB Created: 2021-04-01 00:54:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: fd6eccc885d88689154563c50c787d63 SHA-1: d8f40f83e443f29e388993b34ca6ebcedd0dc868 SHA-256: 7674ed57a7e345107c08b605047220f9c84bb2ab1ca831cd30ad3914b3756093
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to disposable hosting services, indicating a link farm designed for SEO manipulation or phishing. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or distributing further malware. While no scripts were explicitly extracted, the PDF structure and numerous external URLs are indicative of a malicious lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://dugedepap.ru/award?keyword=ncert+maths+book+class+6+solutions+pdf PDF link annotation
    • https://cdn.sqhk.co/kinibemazoz/hjihaif/14069459977.pdfIn PDF document text
    • https://mogefitinovodug.weebly.com/uploads/1/3/0/9/130969954/nogamafeneke.pdfIn PDF document text
    • https://nometoxuf.weebly.com/uploads/1/3/4/2/134266561/xeviseletovuwadafomo.pdfIn PDF document text
    • https://cdn.sqhk.co/zedawuzijis/feidhai/xadojeremiruwijugoripifiw.pdfIn PDF document text
    • https://cdn.sqhk.co/dugelabomaw/8jfUbRm/extreme_moto_racing_3d_apk_update.pdfIn PDF document text
    • https://cdn.sqhk.co/jogeguzotire/TwUheXY/peduxupizubi.pdfIn PDF document text
    • https://cdn.sqhk.co/tulazofava/jaRhdji/amazon_prime_cyber_monday.pdfIn PDF document text
    • https://cdn.sqhk.co/sirazisiluz/gibiawu/hearts_on_fire_rings_for_sale.pdfIn PDF document text
    • https://cdn.sqhk.co/sojowidaz/FiiqNkN/37689776232.pdfIn PDF document text
    • https://lavovozanu.weebly.com/uploads/1/3/0/7/130739022/vegafaraj.pdfIn PDF document text
    • https://cdn.sqhk.co/kikolibub/uiaDILt/newexuribupotizixutanaduw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e68903f-2c1f-4095-b08a-9e03442c3f75/3030334159.pdfIn PDF document text
    • https://711920be-b761-4f0e-a604-762b26663b16.filesusr.com/ugd/ffcbea_58ca5ad5aeb14a37a119a03a80e05a10.pdf?index=trueIn PDF document text
    • https://2d2b1dae-c014-4902-97e6-c3f1d56915cd.filesusr.com/ugd/70e5f7_8cc43903453b4861b9ca274a641452a3.pdf?index=trueIn PDF document text
    • http://towawopijoxodor.rf.gd/1000_canciones_y_acordes_de_guitarra_gratis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5b706fd3-78ac-418f-b942-06b56ddb59a7/5_dysfunctions_of_a_team_examples.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b7180f54-1c25-42ec-b377-54bc734a4a3e/what_would_you_do_if_i_kissed_you_right_now_meme.pdfIn PDF document text
    • https://d064ede3-316f-4d13-8ec5-014b2136b3bd.filesusr.com/ugd/154db6_86350b739760435cbfc6a9d9131427a7.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/941fdd80-bab2-4ce1-82fc-13a5312be5ce/how_to_jump_attack_in_dark_souls_remastered.pdfIn PDF document text
    • http://xojabujujipeze.rf.gd/98487150692.pdfIn PDF document text
    • http://dadeporofi.epizy.com/building_block_model.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/45d0ff80-3a44-4de3-8762-b2ebf59bf931/12542619508.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000efc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFC7 5720 bytes
SHA-256: f2bf397ed472aa78edb18e318d1794c38aa91e1de7cdcde013d243ce9f150b55
font_01_sfnt_off00010312.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10312 10648 bytes
SHA-256: 12f340b840768e36d13202f8c27a69d2c44793ebf686993560c83e94a1642e29