Malicious PDF — malware analysis report

Static analysis result for SHA-256 0423c526d62a594e…

MALICIOUS

PDF

74.2 KB Created: 2021-03-31 02:29:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: f8af9f72445b10781304ac5eca43c989 SHA-1: 56604b11fef909dce297a0480273b16dfd291b7a SHA-256: 0423c526d62a594e9ed6b598c269609b7cdab3849c903704d2e79413ca0b4665
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 0.9997

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/award?keyword=aneurisma+adalah+pdf PDF link annotation
    • https://cdn.sqhk.co/dofexoxev/zhb0UNP/57188610600.pdfIn PDF document text
    • http://pannochki-art.com/jewekotanoxifopave06wx1.pdfIn PDF document text
    • https://cdn.sqhk.co/zotenejek/jiO3bih/stickman_castle_defense.pdfIn PDF document text
    • https://jijajaxasivezix.weebly.com/uploads/1/3/4/5/134588510/4214758.pdfIn PDF document text
    • http://itayoga.space/323098831201bx56.pdfIn PDF document text
    • http://tk-time.site/gogujadajusawisakamanujiwj1a8p.pdfIn PDF document text
    • https://solugelefeko.weebly.com/uploads/1/3/0/7/130740562/5945901.pdfIn PDF document text
    • https://cdn.sqhk.co/tusufawenu/gjXNigj/animal_cinema_video_gan.pdfIn PDF document text
    • http://balifruit.com/flight_tycoon_mod_apkzvrfg.pdfIn PDF document text
    • http://azules.ru/saxevolunexabawejijuxopowtnyl.pdfIn PDF document text
    • https://lonunirixug.weebly.com/uploads/1/3/2/7/132710494/vebifejiruzisefax.pdfIn PDF document text
    • https://manukigobedor.weebly.com/uploads/1/3/4/4/134481395/lameguvilebe_nugubejo.pdfIn PDF document text
    • https://cdn.sqhk.co/dujujema/KShkIjd/globe_at_home_prepaid_wifi_review.pdfIn PDF document text
    • https://xavamukunakupa.weebly.com/uploads/1/3/1/4/131437969/xumepafekaxuv.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/4eedc477-6df6-4a37-85c2-adb471d998d5/homelite_weedeater_carb_adjustment.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b0bcf62-5d69-41f2-acb4-8ea54bc4580f/roman_numbers_worksheet_for_grade_5.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d5caa59-3982-40c6-9769-fdd45ada9b3d/the_poisoners_handbook_chapter_7_summary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc451ef2-5546-4030-90df-353125a7bff2/libro_millonario_instantaneo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd4d1914-655c-42b0-b5f7-451e94f3d314/ron_paulk_workbench_kit.pdfIn PDF document text
    • https://s3.amazonaws.com/pujirageg/nukipefezovurijezif.pdfIn PDF document text
    • https://s3.amazonaws.com/wogikokuzotaxa/tabep.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e769.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE769 5268 bytes
SHA-256: b9264a655192ab5e6e5ff8c9a1d90acddd6d42c4e9e871e8fbb1a37cc8afd922
font_01_sfnt_off0000f920.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF920 10200 bytes
SHA-256: 9fac5cd5f304a56ff4f14f0198090b767a04a46ccee0821a27daa22fb00ba4d6

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