Malicious PDF — malware analysis report

Static analysis result for SHA-256 5536e7c7b3e3cc6a…

MALICIOUS

PDF

73.7 KB Created: 2021-03-30 20:59:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: b3d7f361e996e1d855c853823b27e778 SHA-1: 00d4363e2bbb073cce7e5f6e5f90d89ceb965df8 SHA-256: 5536e7c7b3e3cc6ae471c37ed77b37d101ebab1f38071a356a5c34c268d65f68
186 Risk Score

Malware Insights

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

This PDF file functions as a link farm, containing numerous external links designed to redirect users to various websites. The primary lure appears to be related to search engine optimization content, specifically referencing "how to see old google maps satellite images". The presence of a large number of external links and the use of disposable hosting services indicate a likely attempt at SEO manipulation or ad fraud, rather than direct malware delivery. The ClamAV detection as 'Pdf.Phishing.Trojan' suggests a potential for phishing-related content or a trojanized payload hosted on one of the linked domains.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://zajinet.ru/strik?utm_term=how+to+see+old+google+maps+satellite+images PDF link annotation
    • https://cdn.sqhk.co/lokabawopup/hbiaij1/amc_30_fuqua_houston_tx.pdfIn PDF document text
    • https://cdn.sqhk.co/lebexuzo/fkhjFgj/pusojuxo.pdfIn PDF document text
    • https://cdn.sqhk.co/kufusivekogo/gi4geo9/nuwazifavifuralafinonidi.pdfIn PDF document text
    • https://cdn.sqhk.co/xidafigutoxa/cgjjevF/mx_player_web_series_tamil.pdfIn PDF document text
    • https://cdn.sqhk.co/sebutarukaw/ih93osn/healthy_lifestyle_plan_template.pdfIn PDF document text
    • https://cdn.sqhk.co/xenivoronizu/iiejaif/72182332339.pdfIn PDF document text
    • https://cdn.sqhk.co/pedidagow/HidigcC/72144765628.pdfIn PDF document text
    • https://cdn.sqhk.co/nokulebepoba/jcshdNy/suveruvamekej.pdfIn PDF document text
    • https://cdn.sqhk.co/bokirebi/jhhi932/circus_game_free.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/lekizopiloref/meramec_springs_trout_fishing_report.pdfIn PDF document text
    • https://s3.amazonaws.com/feliso/11219885718.pdfIn PDF document text
    • https://s3.amazonaws.com/jidosatikim/47685225894.pdfIn PDF document text
    • https://f421159b-d329-41e8-bc42-072bc93e4c50.filesusr.com/ugd/65d6f7_4e14686fef7c4374a4936e3caeb7265c.pdf?index=trueIn PDF document text
    • https://e97408dc-4b05-4e3b-9f19-f4127feb49ef.filesusr.com/ugd/a42eed_42931686b8fa4d5081a5d1b512895e99.pdf?index=trueIn PDF document text
    • https://26c1613e-5d28-4fa3-89cb-3d2c9ab59faf.filesusr.com/ugd/fe83c3_a97b6de217e04a349cd2f9b7bd1d6370.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tiluwisulepam/chhota_bheem_movie_video_song.pdfIn PDF document text
    • https://c9977776-9e37-4432-9eae-e541147807da.filesusr.com/ugd/bb6cc6_c73ae5941bef458da824f2c8cbd4ccb9.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/folexapurilowe/tilepajubivuxurigodebada.pdfIn PDF document text
    • https://d52aed46-be45-4f9b-8106-cf6fc7ee66c0.filesusr.com/ugd/b148e5_96ec7911b30f4cc4b345b961b4428bb5.pdf?index=trueIn PDF document text
    • https://13a2bf7a-7930-4518-a7e6-737bf3c0aa4f.filesusr.com/ugd/f5c1a0_77feac288d834aa8ac79e2f9463faea2.pdf?index=trueIn PDF document text
    • https://1c684d3d-b1aa-4d58-8f8e-408f9cf37fac.filesusr.com/ugd/64d889_030754a2151c4dcdba0bb8460fc9feb8.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e38a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE38A 5236 bytes
SHA-256: b5c3a9ea64ff87464f42b14064adfbffc7777d4a247e049d8064009474e7fd72
font_01_sfnt_off0000f559.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF559 10644 bytes
SHA-256: cb4515d284645ac43bc3db1f1e6a30c7c6220359333e9b1f0ca4fdcb5d0640d3