Malicious PDF — malware analysis report

Static analysis result for SHA-256 45a399b5165b6393…

MALICIOUS

PDF

79.1 KB Created: 2021-03-12 15:59:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 1d7ba9a04a151f2b169d17175c949e61 SHA-1: 9f068bea7bfab2f099f28bb735481f88f7f11a5b SHA-256: 45a399b5165b63933d9268b8e263411d6650f6455b4675cf5f2df7984994fb22
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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://golowaki.ru/123?utm_term=grid+template+areas+css+tricks PDF link annotation
    • http://znakomstva18x.site/lokusatubebabunetuxonigektsb.pdfIn PDF document text
    • http://magazinrf.xyz/sarevurebaxovisafibisiviz417v.pdfIn PDF document text
    • https://cdn.sqhk.co/lajefage/bicqa8L/english_stories_to_read.pdfIn PDF document text
    • http://hyipinvest.site/32505690030tr9xz.pdfIn PDF document text
    • https://cdn.sqhk.co/kominepoli/egf7Ciu/bosex.pdfIn PDF document text
    • http://procripton.com/how_to_remove_filter_from_candy_washing_machinez3ftq.pdfIn PDF document text
    • https://cdn.sqhk.co/tuzevawu/hbAhhic/83405453751.pdfIn PDF document text
    • https://cdn.sqhk.co/wesuwajil/Ygjighi/roblox_download_chromebook_free.pdfIn PDF document text
    • http://makebugobiwuka.mypressonline.com/giwojigipin.pdfIn PDF document text
    • https://cdn.sqhk.co/xaranoraf/B2Tjf2w/lisojekibonirofidubixupi.pdfIn PDF document text
    • http://parrrtner.xyz/mikorisokerawinakuwume3lmo5.pdfIn PDF document text
    • http://mojadejazisapa.sportsontheweb.net/66999126605.pdfIn PDF document text
    • http://rasezatoxefu.mygamesonline.org/harry_potter_y_la_orden_del_fenix_audiolibro_latino.pdfIn PDF document text
    • http://rubka.space/kusopewogaxiziwubizorol6fren.pdfIn PDF document text
    • http://cosmosqrab.online/new_yorker_magazine_cover_postersrwth4.pdfIn PDF document text
    • http://jugepawe.medianewsonline.com/69748281194.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zoromexemuzid/directors_report_example_ireland.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0fca957f-9b3b-4932-84d0-43b8b113fef9/runazanekolewirix.pdfIn PDF document text
    • https://s3.amazonaws.com/rebomedug/96674608006.pdfIn PDF document text
    • https://s3.amazonaws.com/verirejon/9966311149.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/38e762d1-2749-4c72-9659-44ef0bfda8d4/alvin_and_the_chipmunks_road_trip_full_movie_online.pdfIn PDF document text
    • https://s3.amazonaws.com/makumapikeze/26793898916.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f96b2c47-89f7-4079-8d98-81a7cdd47c32/chet_holmes_ultimate_sales_machine.pdfIn PDF document text
    • https://s3.amazonaws.com/jarawaxanivu/52863060868.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_off0000f4ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4AC 5312 bytes
SHA-256: 7451de9af95ddc131475b09d781a16a27a2d42106166cda40b3a288a038027bb
font_01_sfnt_off000106aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106AA 11824 bytes
SHA-256: c7ba744f35c7f8e86dcfa178e36ecd394ff5754b2e7fb5fe110f8427422ef553

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