Malicious PDF — malware analysis report

Static analysis result for SHA-256 886a40d5a6c551f4…

MALICIOUS

PDF

129.9 KB Created: 2021-04-09 05:55:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 30ac86f8a03e0900831bd222e293a82b SHA-1: 745cf026d2fe6670bc8db6dc4371a4f524775f66 SHA-256: 886a40d5a6c551f42720d5860d4627f0b616545373e4b681c21aee13fd39293c
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 0.9974

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://ponafet.ru/strik?utm_term=html+tags+in+hindi+pdf+download PDF link annotation
    • http://xujilutobidiko.iblogger.org/lutudawenexegigapawux.pdfIn PDF document text
    • https://cdn.sqhk.co/zekuxemelop/gf0idge/38433890338.pdfIn PDF document text
    • http://viwumurowiwoba.22web.org/princely_advice_for_a_happy_life.pdfIn PDF document text
    • http://miwasigal.mywebcommunity.org/wofexaxi.pdfIn PDF document text
    • http://polystate.ru/xebozutefufe1gke2.pdfIn PDF document text
    • http://zoomita.space/more_solubility_curve_reading_practice_answerske6v5.pdfIn PDF document text
    • http://vidapabil.22web.org/small_to_pptx.pdfIn PDF document text
    • https://cdn.sqhk.co/susiwebuvowo/fs1hfCB/28845451784.pdfIn PDF document text
    • http://podjem2.club/muxomumgwhz3.pdfIn PDF document text
    • http://ruxuzosok.mywebcommunity.org/83482204959.pdfIn PDF document text
    • http://xulepeban.22web.org/43334778719.pdfIn PDF document text
    • http://pelistens.xyz/kugakuk6lw0q.pdfIn PDF document text
    • https://cdn.sqhk.co/xosuridasago/bjfoEjb/telabawexekagewosivezi.pdfIn PDF document text
    • https://cdn.sqhk.co/gujuvizaja/BIZhfig/nakekosufumani.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://zesugipove.onlinewebshop.net/66610108869.pdfIn PDF document text
    • http://tulufuparogig.epizy.com/13595828947.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d125e9a9-18e4-4bb0-a513-0df7d326596e/singing_warm_ups.pdfIn PDF document text
    • http://wurasegato.rf.gd/96216286119.pdfIn PDF document text
    • http://likutolejit.onlinewebshop.net/a_z_dream_dictionary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/11946a52-eb64-4d73-bdbf-612d954f8a5f/amana_front_load_washer_clean_drain_pump.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f9fdbd34-d959-40b9-bfaa-c6b9b3c8bda5/how_much_does_it_cost_to_own_a_firehouse_subs.pdfIn PDF document text
    • http://wabalegawamiraj.rf.gd/solar_hybrid_air_conditioning_system.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a321d60-8a8d-4083-860d-1bc65db244bc/mejeloke.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001a130.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A130 5080 bytes
SHA-256: 56d56bafef50bf6f6782c78375643b74432a6afd458e8ef03d220fe5dbc1c85e
font_01_sfnt_off0001b213.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B213 6460 bytes
SHA-256: f8984e9593ee9d461129857dbabf8292e4beb15fcc2cb9ac194b5b91453b4d6d
font_02_sfnt_off0001c1df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C1DF 12116 bytes
SHA-256: 57799b6b6b61705a325f2a63ef88214e9b6483c0aab92889b42e6847f8dc2a7c
font_03_sfnt_off0001eb0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1EB0E 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e