Malicious PDF — malware analysis report

Static analysis result for SHA-256 39401525567aaa3c…

MALICIOUS

PDF

91.3 KB Created: 2021-03-22 04:41:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 879849c9de6099b98a1f00af189ffad9 SHA-1: a60d2ab8aa0ad2d262d5a4df9395f225a6e76176 SHA-256: 39401525567aaa3c626169ccc2c4bde6f8a704eec47238c7246d39d273244016
126 Risk Score

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 0.9992

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://lozipotod.ru/wix?keyword=asphalt+xtreme+apk+data PDF link annotation
    • http://palopepidek.mypressonline.com/kenmore_elite_mini_fridge_parts.pdfIn PDF document text
    • https://cdn.sqhk.co/pubamegumox/hjhdFzJ/kurexosanomutijeg.pdfIn PDF document text
    • http://wtia.space/noticias_telemundo_52_los_angeleswu12b.pdfIn PDF document text
    • http://helps-lnstagramcopyrights-about.com/8756556451o5eks.pdfIn PDF document text
    • https://cdn.sqhk.co/sosobita/ieBij9Q/color_rings_3d_ring_toss_game.pdfIn PDF document text
    • http://palaxofivuleduj.medianewsonline.com/45457482356.pdfIn PDF document text
    • https://cdn.sqhk.co/wuvevalor/OgfcMge/97545267639.pdfIn PDF document text
    • http://kijekidajefi.getenjoyment.net/memrias_pstumas_de_brs_cubas_filme_completo_dublado.pdfIn PDF document text
    • http://feludekinopotas.scienceontheweb.net/dark_souls_3_best_pvp_builds_2019.pdfIn PDF document text
    • http://ayazshabutdinov.club/what_are_4_calling_birds3wqe8.pdfIn PDF document text
    • https://cdn.sqhk.co/jigijobofofa/qFhoicu/super_hero_toy_blasters.pdfIn PDF document text
    • https://cdn.sqhk.co/vusutazomaga/bjGgdge/tubidy_io_music_download_free_mp3_download.pdfIn PDF document text
    • http://zaxegod.getenjoyment.net/4684147431.pdfIn PDF document text
    • http://guzexesuge.mypressonline.com/12_rights_of_medication_administration.pdfIn PDF document text
    • http://memowelubi.mygamesonline.org/59508728711.pdfIn PDF document text
    • http://ig-copyrightviolation.com/89665273686thopu.pdfIn PDF document text
    • http://9gusevshop.website/80917492540u3ez6.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://baletax.onlinewebshop.net/foxamelutalar.pdfIn PDF document text
    • http://bavotuvezomevi.myartsonline.com/how_to_use_ryobi_miter_saw_stand.pdfIn PDF document text
    • https://s3.amazonaws.com/wujodibu/fetib.pdfIn PDF document text
    • https://s3.amazonaws.com/muvarelo/inventory_list_template_for_landlords.pdfIn PDF document text
    • https://s3.amazonaws.com/tejuvonixag/angielski_sownik_tematyczny.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010d7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D7F 3112 bytes
SHA-256: 8bf3e5abe6c74bbc5c46118600a8ee32e7a2ff129836c229999598d59f2b6d96
font_01_sfnt_off000118bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118BC 4844 bytes
SHA-256: 2f6a25d04ee2e1225966a2443cbf26ff16375eece77c0b27d620750647dc953b
font_02_sfnt_off00012927.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12927 11984 bytes
SHA-256: ec65ef5b8db88c94eb8e06b7560a34e4246a400466a9b733c9fcc1c71130e22e
font_03_sfnt_off00015121.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15121 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f