Malicious PDF — malware analysis report

Static analysis result for SHA-256 862442c166b1af4c…

MALICIOUS

PDF

70.9 KB Created: 2021-03-16 22:30:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: d2f4b3b409212741ad9d0a9419e9d239 SHA-1: 45df48d4f71a7e2c420bde455b80d2ffb31414ca SHA-256: 862442c166b1af4ca20ec75bac238a87ac8cf2e24064a63be7a05a21dd647cb3
186 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including brand-impersonation credential phishing and a ML classifier. It contains numerous external URIs, many of which point to disposable hosting or redirectors, suggesting a phishing campaign. The embedded URLs and the overall structure indicate an attempt to lure users into clicking malicious links, likely to steal Amazon credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://lejimawemo.weebly.com/uploads/1/3/0/7/130739028/tikagobegozi.pdf.
  • 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://nipisod.ru/wix?keyword=webmail+wfhc+wfhcd PDF link annotation
    • http://pimifawimonidij.mywebcommunity.org/how_to_clean_hamilton_beach_easy_reach_toaster_oven.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389107/normal_5fce432851528.pdfIn PDF document text
    • http://wofurasosezisax.mywebcommunity.org/cambridge_igcse_ict_2nd_edition_download.pdfIn PDF document text
    • https://lejimawemo.weebly.com/uploads/1/3/0/7/130739028/tikagobegozi.pdfIn PDF document text
    • http://fogejebimo.scienceontheweb.net/beowulf_sparknotes.pdfIn PDF document text
    • https://xosebabonewita.weebly.com/uploads/1/3/4/6/134613761/2899637.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490375/normal_5ff3fcbd02a48.pdfIn PDF document text
    • http://pakunobun.getenjoyment.net/12th_zoology_book_in_tamil_medium_download.pdfIn PDF document text
    • https://juwexulomo.weebly.com/uploads/1/3/4/3/134385858/bemigebikij_gebatosire_noluzime.pdfIn PDF document text
    • http://bejawutipage.mywebcommunity.org/43680500097.pdfIn PDF document text
    • https://kadogejajufa.weebly.com/uploads/1/3/4/7/134717900/depivexu.pdfIn PDF document text
    • http://laribij.scienceontheweb.net/centralisation_and_decentralisation_in_public_administration.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/kovozenamofox/88536071847.pdfIn PDF document text
    • https://aa4c2489-c93b-4667-afab-104bf5323bad.filesusr.com/ugd/8b49c6_d1d03de264144b30a230e51e21ac25fe.pdf?index=trueIn PDF document text
    • http://kimawawasero.onlinewebshop.net/how_to_setup_linksys_wrt54g.pdfIn PDF document text
    • https://s3.amazonaws.com/fipijife/nubemusajazojo.pdfIn PDF document text
    • http://pewubik.atwebpages.com/hindu_baby_girl_names_starting_with_a.pdfIn PDF document text
    • http://weponigonimogo.myartsonline.com/zanegebuv.pdfIn PDF document text
    • https://s3.amazonaws.com/jexijer/vakozakijidanobopabikop.pdfIn PDF document text
    • https://s3.amazonaws.com/lekezaru/happy_birthday_songs_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/wiremeresegikon/parrot_mki9200_user_manual.pdfIn PDF document text
    • https://5a2ada08-5b6c-402a-b0df-3636415b461e.filesusr.com/ugd/434ae6_b7e9dbe33bf648afac7e0eba9679e25e.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_off0000d801.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD801 5232 bytes
SHA-256: 655ddaf8d75f76e97ee7c9a18785dee33da7a9ab5cdd487dc418349c9a7d7510
font_01_sfnt_off0000e9c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9C6 10900 bytes
SHA-256: 9d8e30f48b4bda801d7eb0128ec944087ef76b45442d8387111c2be59ebeb6a9

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