Malicious PDF — malware analysis report

Static analysis result for SHA-256 143d184541f0e1ea…

MALICIOUS

PDF

79.2 KB Created: 2021-03-29 11:40:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 805dfd08194ccc92f898005e62391506 SHA-1: b813f6928b7c1c49ffd2074d593e907643309bb8 SHA-256: 143d184541f0e1ea6363abc3c70d0d0213378c481793389fa053238a15074b32
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV. It contains numerous embedded links, with the primary suspicious URL being https://pelibifir.ru/wix?keyword=old+brookville+high+school+lynchburg+va. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the document is designed as a link farm on disposable hosting, suggesting a phishing or malware distribution campaign.

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://pelibifir.ru/wix?keyword=old+brookville+high+school+lynchburg+va PDF link annotation
    • http://shoop-fg.ru/android_studio_for_windows_7_64j69eu.pdfIn PDF document text
    • https://gowiwoniba.weebly.com/uploads/1/3/1/8/131857243/a86b35d7d3dac9.pdfIn PDF document text
    • https://zativazu.weebly.com/uploads/1/3/4/5/134586929/sebelukujusus-xodaxezofaju.pdfIn PDF document text
    • http://just-gopro.com/la_la_la_song_musich032r.pdfIn PDF document text
    • https://sobopagep.weebly.com/uploads/1/3/0/8/130873740/zezerijig.pdfIn PDF document text
    • http://bt-management.website/the_light_phone_2_verizoneb6hs.pdfIn PDF document text
    • https://wiwovadale.weebly.com/uploads/1/3/5/3/135322143/zorusi.pdfIn PDF document text
    • https://bokesaxigalul.weebly.com/uploads/1/3/0/7/130776824/9407687.pdfIn PDF document text
    • http://changepass.online/ukulele_strumming_patterns_4_4d4fg6.pdfIn PDF document text
    • http://lnstagramverifiedsbadgesforms.com/zerejekkt8mj.pdfIn PDF document text
    • http://matteset-spon.space/our_god_chords_key_of_awws0f.pdfIn PDF document text
    • http://agent-spv.space/wixabewodonelpt5l.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jedovimesize.epizy.com/litterature_africaine_negritude.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/67970770-3a8e-40e9-b4e7-a436b1b46004/lofumijunuzaz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a969389e-5aca-4411-823c-6aedf1314c5c/nirugebuxaxafisejuriv.pdfIn PDF document text
    • https://s3.amazonaws.com/xokebore/types_of_allen_bolts.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ae11e804-cdda-474a-b546-1a944a12382c/how_do_i_type_a_symbol_with_my_keyboard.pdfIn PDF document text
    • http://dewudirana.epizy.com/building_construction_cost_calculator_free.pdfIn PDF document text
    • http://vigibuvene.epizy.com/tyrolia_adrenalin_review.pdfIn PDF document text
    • https://s3.amazonaws.com/woberiz/kamen_rider_agito_driver_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3cd2d7d3-a985-4305-993d-1050559f0fe9/gajudugos.pdfIn PDF document text
    • https://s3.amazonaws.com/degisapemifa/90139132966.pdfIn PDF document text
    • https://s3.amazonaws.com/zuwimadaneb/which_brand_is_best_in_washing_machine.pdfIn PDF document text
    • https://s3.amazonaws.com/tonemakopinibem/53239579037.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_off0000f61d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF61D 5596 bytes
SHA-256: 4e8e5fa1a8e144282ade829e6928943b6136c08d6d0f7a3dcba218d7c9870de4
font_01_sfnt_off0001092c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1092C 11200 bytes
SHA-256: f40b0d15a194a50056da605e0fc551d60c24b4c8fdfe4c2fb79abde0bbf072a3

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