Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a52ca530f19cddc…

MALICIOUS

PDF

120.2 KB Created: 2021-03-22 23:50:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 56a61e848ff26960135a4925ebf85d2c SHA-1: bd4aae51c2fa91ac17ae8b496d0d7198ac0cd9da SHA-256: 9a52ca530f19cddc128542e2afa8ab83d14bddc4d181f4cf99c6c07c5de45b6f
126 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs pointing to suspicious domains, including one identified as a link farm on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://jottigo.ru/award?keyword=introduction+to+naval+architecture+3rd+edition+pdf PDF link annotation
    • http://datingsexchat.site/jumper_tops_grey0x280.pdfIn PDF document text
    • http://amorexpo.com/75565832703gvaf1.pdfIn PDF document text
    • http://sfhgfje5df.xyz/123507489688ta7s.pdfIn PDF document text
    • http://ppl-nutrshopfit.website/gofubusirimokonozab3pqu7.pdfIn PDF document text
    • http://feyakast.online/demewetipitn0qu.pdfIn PDF document text
    • http://zagavexakagin.mypressonline.com/wumuzixizagedizore.pdfIn PDF document text
    • https://cdn.sqhk.co/kuwusemob/jathiji/tigesavezodavawazezodoju.pdfIn PDF document text
    • https://cdn.sqhk.co/kabawamurelo/hfhjjfm/85451191546.pdfIn PDF document text
    • https://cdn.sqhk.co/pofoxubo/n0ibhdJ/unlimited_money_racing_games.pdfIn PDF document text
    • https://cdn.sqhk.co/gebitasixa/bN1eGhj/piano_tiles_2_unblocked_games.pdfIn PDF document text
    • http://puvepum.getenjoyment.net/jorge_luis_borges_sus_principales_obras.pdfIn PDF document text
    • https://cdn.sqhk.co/pabilere/diahaih/telegram_link_download_movie.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/279b08e4-38d1-4699-a945-87aea9f547f4/66037026058.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b08227f-69f0-4f43-8f4c-aae5fdf8da6e/minecraft_guide_books_8-book_collection.pdfIn PDF document text
    • https://s3.amazonaws.com/tetofamuxulil/startup_pitch_keynote_template.pdfIn PDF document text
    • http://perexuwofogefo.onlinewebshop.net/mezotudokudadazisomewufuv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2038f1d9-ffa3-462a-9219-c6cc6b4346b0/79108515356.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9405cd5d-b29a-4f73-817b-d86606f0dd37/21805250890.pdfIn PDF document text
    • https://s3.amazonaws.com/pesetufavo/juzazenuzusukubu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/187e67aa-3e70-4462-9288-76564b617130/pababoxavovam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1e7b5c97-e44c-4cce-a738-431eb4877ff3/skil_20v_cordless_circular_saw.pdfIn PDF document text
    • http://nerezusilanake.atwebpages.com/canon_palm_printer_p1-dh_v_ink_replacement.pdfIn PDF document text
    • https://s3.amazonaws.com/bogijexu/werovojoz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1421a6d9-ebbd-489e-bd99-63e3d02074a4/82103923054.pdfIn PDF document text
    • https://s3.amazonaws.com/punurum/riboxiladewo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e2e45956-f624-42d9-8c6f-16c859a22669/12468272205.pdfIn PDF document text
    • https://s3.amazonaws.com/ratixifo/31269060106.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db723211-cc66-416b-b4a4-c00fc78daedc/montana_1948_full_book_online.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00018228.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18228 5228 bytes
SHA-256: 44671ec8bdab8dae244a815dfa480313d64dffe0c110a8d38fbf4b089e43a129
font_01_sfnt_off000193f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x193F4 12204 bytes
SHA-256: 47f16b05cb8bcd2aceec3b7a9edb093b924af978e10196750a69b0db5c0aedfb
font_02_sfnt_off0001bd88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BD88 16080 bytes
SHA-256: dbf142a5ee5912dba0d06f749c68ada68fc433a58d5d71ae416dbac8ced49b19

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