Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0145968c09979d8…

MALICIOUS

PDF

82.6 KB Created: 2021-04-07 10:55:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 2a0a92a95393e96477ea42dd8d76de05 SHA-1: 55d509317ba1804836dee9bab9d7eac0403be995 SHA-256: e0145968c09979d81ddf8c48131fb3af04cc3280ec6b6f4ae9608e4b647410a2
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 0.9997

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://ponafet.ru/strik?utm_term=without+remorse+book+pdf PDF link annotation
    • https://cdn.sqhk.co/fodexuxefeba/UIhj9vz/habitable_worlds_asu_answers.pdfIn PDF document text
    • http://folotexuxopig.iblogger.org/ids_auto_typer_software_free.pdfIn PDF document text
    • https://cdn.sqhk.co/bexoninodag/gHhfijf/zoho_social_media_login.pdfIn PDF document text
    • http://xokebidukefu.getenjoyment.net/fetejukiwivejututedew.pdfIn PDF document text
    • https://cdn.sqhk.co/begokaxawip/jKMggjK/mitojopoj.pdfIn PDF document text
    • http://zanovekolasin.mywebcommunity.org/baby_registry_checklist_babycenter.pdfIn PDF document text
    • http://fuxokubatasiju.22web.org/how_do_i_access_private_channels_on_roku.pdfIn PDF document text
    • https://cdn.sqhk.co/sativomofij/hggggjq/10038796972.pdfIn PDF document text
    • http://xijowiwo.22web.org/the_fall_of_the_house_of_usher_summary_prezi.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/dosalapasenow/tegexoralewomow.pdfIn PDF document text
    • https://d397443b-80d0-4e74-967c-4ce830ee3754.filesusr.com/ugd/0a76f0_6ca4e93528c14a66b0440362d45b0914.pdf?index=trueIn PDF document text
    • https://a04ad255-06d6-4b17-97e7-91173d300295.filesusr.com/ugd/6864df_92ce47e7c0b94771a2b8c2f60a95d5b6.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bizamesuwepe/26522335104.pdfIn PDF document text
    • https://s3.amazonaws.com/ganubifirigevi/comcast_remote_codes_for_element_roku_tv.pdfIn PDF document text
    • https://b64dd490-e5b9-492f-89ff-e398ecee904c.filesusr.com/ugd/5926b4_bbfa1031de9341ecae13d8e86737f755.pdf?index=trueIn PDF document text
    • http://bonanelokuweje.rf.gd/77427449096.pdfIn PDF document text
    • https://50b44c92-959e-4a15-bf83-93d6b2b518d6.filesusr.com/ugd/3ed44c_4c851af563bf4208bab256715190172c.pdf?index=trueIn PDF document text
    • https://a867a740-3546-49c9-bb92-c76f735cad7e.filesusr.com/ugd/c312ff_fc78151703d84a5cb6fd572738834602.pdf?index=trueIn PDF document text
    • https://28f2c00a-638b-45ec-8848-4d649cb6aba9.filesusr.com/ugd/946f28_b3630abf45254bd38b936f9406e8afd9.pdf?index=trueIn PDF document text
    • http://mugosovexu.epizy.com/3ds_max_2018_update.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_off000104a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104A7 5256 bytes
SHA-256: c4dbf50541f9556dafb51ae8aa4188be9c73e5979bb5f6251892945245ed5237
font_01_sfnt_off00011668.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11668 11384 bytes
SHA-256: 9dcb9cc41101ed4353b83d848690f459ff507283ee5088b54a451bfe7cdc5097

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