Malicious PDF — malware analysis report

Static analysis result for SHA-256 4908b8dd400f135f…

MALICIOUS

PDF

84.5 KB Created: 2021-03-21 06:24:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 59619600c6d53a13d5ed5dde883db465 SHA-1: 23d8e6f5f88139b6e529453abebb81206bfcc88e SHA-256: 4908b8dd400f135f7342249bbbc06979f156438523e01fe61da10182c15b518e
186 Risk Score

Malware Insights

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

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 0.9955

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://mezovuduw.ru/strik?utm_term=how+to+reset+garmin+vivofit+2 PDF link annotation
    • https://cdn.sqhk.co/janezewufaj/2iiicjc/police_drift_car_driving_simulator_mod_money.pdfIn PDF document text
    • https://cdn.sqhk.co/nuvexajamu/jiv53ig/7830561326.pdfIn PDF document text
    • https://cdn.sqhk.co/najafizox/nehimha/8_ball_pool_unblocked_miniclip_download.pdfIn PDF document text
    • https://cdn.sqhk.co/gibuzini/1M7c4gc/3999111040.pdfIn PDF document text
    • https://cdn.sqhk.co/zojoguxuban/Qheichg/hangouts_meet_app_download_for_mac.pdfIn PDF document text
    • https://cdn.sqhk.co/motanunika/vidmjdM/19596281102.pdfIn PDF document text
    • https://cdn.sqhk.co/fusajovogi/jawhfqK/12425377029.pdfIn PDF document text
    • https://cdn.sqhk.co/takularozo/hf3a7ia/spaceballs_2_movie.pdfIn PDF document text
    • https://cdn.sqhk.co/gabadifofibo/fTcBjhY/minecraft_free_download_pc_unblocked.pdfIn PDF document text
    • https://cdn.sqhk.co/saboxiwago/ohbhghg/tisijokiroluralebufudo.pdfIn PDF document text
    • https://cdn.sqhk.co/mewixamok/W2tOghM/retekegudazu.pdfIn PDF document text
    • https://cdn.sqhk.co/pazaxefuma/Cnhaido/cowboy_caviar_dip_pioneer_woman.pdfIn PDF document text
    • https://cdn.sqhk.co/zejegure/1ws7UCL/photo_gallery_album_download.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://a84030a7-2e48-4039-807a-383e2b7216cc.filesusr.com/ugd/c5d40f_0998a52fc60c46ae9a89966e9494860e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/risalenefazozo/xarotaraduvidimavezu.pdfIn PDF document text
    • https://d52dad9d-cc67-49f8-afd5-5db9580037d8.filesusr.com/ugd/89b1bc_7b55befaa3f84711bd5f55e830fc513e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xewamejixolefaj/work_rules_book_laszlo.pdfIn PDF document text
    • https://1a9cd40a-f0d6-44d4-a143-19288280ca2b.filesusr.com/ugd/7a13df_5bad206c302e456dbd2e7c6e3a0ab85c.pdf?index=trueIn PDF document text
    • https://6f672a44-e16c-4921-a0f1-e3781c0647c5.filesusr.com/ugd/bda22a_8d7aa879298441ce9ee6c07220cc7cf9.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sukobogixe/how_to_pair_ilive_soundbar_to_phone_without_remote.pdfIn PDF document text
    • https://f13dd0f9-fe0a-4257-a88d-d9af1a1cf0e3.filesusr.com/ugd/d954c5_ab2384ab2fe84f65a87d3a563fd5f7ee.pdf?index=trueIn PDF document text
    • https://86146b48-cf95-488a-b5a0-22832f4589a6.filesusr.com/ugd/3b4eee_31e9eb495b0446188d7d28547ee6e8ac.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zeworibuzoza/24447642122.pdfIn PDF document text
    • https://502f924d-676a-41b3-8220-87c01882f600.filesusr.com/ugd/5a20bb_5489149d4e0a42cd9ee446d01e90d009.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/rafiralexezol/electronic_pest_repeller_consumer_reports.pdfIn PDF document text
    • https://dcd55a6f-f4d9-4ab7-9ea0-0dac4ffa5d6f.filesusr.com/ugd/f7cbe4_a926206cdcb441a48abfb23913f7a013.pdf?index=trueIn 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_off0000f11d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF11D 5300 bytes
SHA-256: 1a9316b46048cd5bfca65d9e5bbfc6daa309c7a00c11d4f3eef3e790f5265f4d
font_01_sfnt_off00010328.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10328 10920 bytes
SHA-256: 41a97cdd0b1529e88cff9ce0715b4ba5888a6c505a8d101d691685a7efb834a3
font_02_sfnt_off0001288d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1288D 18088 bytes
SHA-256: a29e51b393fd63468122de8e895bd331583182b457bf9c4c3abf92ced15d02a4