Malicious PDF — malware analysis report

Static analysis result for SHA-256 67feaceac8d96210…

MALICIOUS

PDF

65.6 KB Created: 2021-06-10 00:56:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 7f840453a72bbbab2ff326790b688e82 SHA-1: 54879d764036ed552ee1f47bb80c86ca9da1ad7b SHA-256: 67feaceac8d96210b54acd98e812047cc7f9c913aa62ce444f2afcc65b6fa9dd
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 0.9993

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://catamma.ru/pbw?utm_term=metabolism+worksheet+answer+key PDF link annotation
    • https://sivoroxusakigob.weebly.com/uploads/1/3/1/4/131453081/6128096.pdfIn PDF document text
    • https://dubigeta.weebly.com/uploads/1/3/5/3/135341625/3510216.pdfIn PDF document text
    • https://zadiletewus.weebly.com/uploads/1/3/4/5/134522124/tisizuwikuxelado.pdfIn PDF document text
    • https://tuvikeba.weebly.com/uploads/1/3/4/7/134732988/balevinemefem.pdfIn PDF document text
    • https://gidafefutor.weebly.com/uploads/1/3/4/0/134040883/lusuf-zevixudo-kiroga-pomavuv.pdfIn PDF document text
    • https://gejovekozeja.weebly.com/uploads/1/3/4/4/134401956/5136637.pdfIn PDF document text
    • https://gotumofavi.weebly.com/uploads/1/3/4/6/134602885/5675195.pdfIn PDF document text
    • https://vudufidobisij.weebly.com/uploads/1/3/4/6/134673615/jifumaxetobipuril.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gitefov.pbworks.com/w/file/fetch/144570180/ketogenic_diet_recipes_free.pdfIn PDF document text
    • http://pefagisunel.pbworks.com/w/file/fetch/144755379/38051876244.pdfIn PDF document text
    • http://zorisomofi.pbworks.com/f/64587772571.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fec95ee0-a3b7-4064-8b0d-d1aee5a45ed4/the_hunger_games_2_full_movie_free_download_in_hindi.pdfIn PDF document text
    • http://todenulaw.pbworks.com/w/file/fetch/144994548/deepwater_horizon_movie_download_mp4.pdfIn PDF document text
    • http://sizolasipape.pbworks.com/w/file/fetch/144414942/sijuxevoku.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8619b90f-dc47-478c-aa44-d90cf0c342ae/el_evangelio_segun_jesucristo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/914d08a7-7eee-4fb7-87a7-fef2f665b185/zafumabak.pdfIn PDF document text
    • http://bevojoluvu.pbworks.com/w/file/fetch/144481284/what_are_good_coping_skills_for_anxiety.pdfIn PDF document text
    • http://gatasulupu.pbworks.com/f/bewutefimixikus.pdfIn PDF document text
    • http://dibesusajob.pbworks.com/f/buddy_toss_hack_apk_download.pdfIn PDF document text
    • http://tufukamapaf.pbworks.com/f/hp_probook_450_g5_battery.pdfIn PDF document text
    • http://funuvutidip.pbworks.com/w/file/fetch/144468219/bawotitab.pdfIn PDF document text
    • http://gulisapil.pbworks.com/w/file/fetch/144419733/la_princesa_que_creia_en_los_cuentos_de_hadas_sinopsis.pdfIn PDF document text
    • http://gosavepifij.pbworks.com/f/38799863161.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_off0000c618.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC618 5328 bytes
SHA-256: 6bbc506fd0db06d954d2a00655e6cc1293efa98c3ef91e674cdacd555bd529a3
font_01_sfnt_off0000d828.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD828 9656 bytes
SHA-256: 50ec49b6f8bd1a5104d28ec6eb498f44677427ccf23a6888893b5dfb757ae000

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