Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ca4dedac58e330d…

MALICIOUS

PDF

96.7 KB Created: 2021-03-19 18:08:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 73e6d1c94589289c2e49ee3422f04eb4 SHA-1: 2cee466e1ebc9af111015377d1e23f7d7b8591b7 SHA-256: 1ca4dedac58e330df295832d80a2438c288ed202ffb8c5bf509b986b0ee99534
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 0.9994

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://xajibur.ru/strik?utm_term=uglies+by+scott+westerfeld+movie PDF link annotation
    • http://mkr-olimp.info/26737669467kn5ce.pdfIn PDF document text
    • http://alexsaf.ru/aslay_ft_alikiba_mp4mnrjy.pdfIn PDF document text
    • http://meetsalle.xyz/pals_pa_contact_numberlp2cz.pdfIn PDF document text
    • https://cdn.sqhk.co/moxelutedoje/ZKgcAgj/free_online_texas_holdem_poker_play_money.pdfIn PDF document text
    • http://shoppermarket.online/carquest_wearever_gold_ceramic_brake_pads_-_front_4-pad_sete4q2c.pdfIn PDF document text
    • http://online-bestshop.xyz/quantum_touch_techniquesz6mdf.pdfIn PDF document text
    • http://vashastrahovka24.ru/11852042451l26vo.pdfIn PDF document text
    • http://mixed-rootwork.com/formal_letter_for_job_offer5aelq.pdfIn PDF document text
    • http://legionmone.xyz/country_roads_lyrics_and_sheet_musicbu7w6.pdfIn PDF document text
    • https://cdn.sqhk.co/vexapalas/mhieegh/errday_big_baby_tape_bpm.pdfIn PDF document text
    • http://vefipitop.22web.org/alien_shooter_td_mod_apk_unlimited_money.pdfIn PDF document text
    • http://resimpub.com/the_exorcist_book763vt.pdfIn PDF document text
    • http://procripton.com/zutujepadibixurojenavh59iu.pdfIn PDF document text
    • http://d2-club.ru/36452508568i9b7.pdfIn PDF document text
    • http://useraisins.pro/xivefuhb9ky.pdfIn PDF document text
    • http://4kuhd.me/chhello_divas_movie_free61ct6.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://nagasupewi.rf.gd/2008_club_car_precedent_service_manual.pdfIn PDF document text
    • http://zovixiluru.epizy.com/concept_map_template_printable.pdfIn PDF document text
    • http://budejigejemuje.rf.gd/zejosimow.pdfIn PDF document text
    • http://bufiziwo.rf.gd/51912302859.pdfIn PDF document text
    • http://supegawezokex.epizy.com/mettler_toledo_ind560_calibration_manual.pdfIn PDF document text
    • http://zepogofeto.epizy.com/bose_cinemate_remote_volume_not_working.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012e5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E5A 5196 bytes
SHA-256: 7161997e7eccb4c5f622d6e698ead2710b8393cd3e4b9291d88b4a32fd6d3634
font_01_sfnt_off00014020.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14020 11424 bytes
SHA-256: c9f566202cfffbcaad82df002503d4e2d8f4fe4aa04435a182cf721f2c6b264f
font_02_sfnt_off000166f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x166F9 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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