Malicious PDF — malware analysis report

Static analysis result for SHA-256 4fc61c078fbed465…

MALICIOUS

PDF

67.2 KB Created: 2021-03-18 11:39:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 73003f7e007110f0cef7a02abf6a2f6f SHA-1: b2e29732ece1c492dc4b9ca2f62e92b26bd40d3a SHA-256: 4fc61c078fbed4654caee03a5d0f031168429b005c10550cc27b1e570608ce48
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://xezojetit.ru/wix?keyword=ps+emulator+apkpure PDF link annotation
    • http://jijuduli.mywebcommunity.org/dipo_rei_histria_completa.pdfIn PDF document text
    • https://cdn.sqhk.co/tovipovo/eDU6r4v/farming_simulator_16_free_download_apkpure.pdfIn PDF document text
    • http://dalkomis.website/videocitofono_bticino_classe_100_manualeqd6t3.pdfIn PDF document text
    • http://nibelv.xyz/vipibumos42m7f.pdfIn PDF document text
    • http://kotudekudoges.getenjoyment.net/risuwinulus.pdfIn PDF document text
    • https://cdn.sqhk.co/dediwifime/iCgghgw/dark_knight_rises_villain_images.pdfIn PDF document text
    • https://cdn.sqhk.co/dejuxafe/hggdjc1/36342333144.pdfIn PDF document text
    • http://tizezs.xyz/aerial_silks_performance_songsxjqnu.pdfIn PDF document text
    • http://fidekeleko.medianewsonline.com/42877353487.pdfIn PDF document text
    • https://cdn.sqhk.co/tixunadegu/gcgfChi/4218182065.pdfIn PDF document text
    • http://uscreditinquiry.info/minecraft_games_free_for_ipad9p6xu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://vidugozu.atwebpages.com/vw_polo_6r_service_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9a169ad6-c554-4dae-9bf9-96cd421c19fc/kifubosukasorinaviwidum.pdfIn PDF document text
    • https://a0f88182-e1f9-4a9c-ba22-d5ce004c6985.filesusr.com/ugd/2f3216_f3ebfc7d026e43039f07444594520d54.pdf?index=trueIn PDF document text
    • https://7c8f45b7-e058-4e27-bccd-8ee7dcb26900.filesusr.com/ugd/d5cf39_7d4c3897c2564ee4a90ebe9f0f088763.pdf?index=trueIn PDF document text
    • https://c03dc86c-c454-462c-b858-8c2776b4c11f.filesusr.com/ugd/7dd30d_b9da29f5c92946c9b194219abfd2ae6e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/b12bfea1-2667-464a-ad02-e3196c8ee079/nitisifunogeturexi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd2af6d3-ace7-4838-a47f-031bce6487a6/how_do_i_get_the_unlock_code_for_my_panasonic_tv.pdfIn PDF document text
    • http://wozimape.onlinewebshop.net/macbeth_act_4_scene_3_modern_english.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bf47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF47 4760 bytes
SHA-256: d5ab1f7f6805122a7cfaad8323f9e49c4f7f07bc5e59ac60ba8aef84fde611c5
font_01_sfnt_off0000cf76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF76 10120 bytes
SHA-256: f4fb26e4b7bbb41df98f08b7103923e02976db21f89c6537a1492d50c5ee32ec
font_02_sfnt_off0000f1be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1BE 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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