Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a701f44435dc82d…

MALICIOUS

PDF

78.1 KB Created: 2021-05-02 14:04:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 6296aa222162c42ee2079372a1c20648 SHA-1: 5ac5fc76f6abad1e06f73ead9005b77b0828bf76 SHA-256: 8a701f44435dc82d8a314576e362aa03d5840648c311554c26ecd1b4c3906c73
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9992

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://vilenefex.ru/strik?utm_term=linksys+ac1200+setup+wizard PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4417995/normal_5fca4895510f1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423431/normal_605d3793093b6.pdfIn PDF document text
    • http://xovekofetovo.66ghz.com/yann_tiersen_l_absente_piano_sheet_music.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486523/normal_6039efe24a37c.pdfIn PDF document text
    • http://davufemalolaj.iblogger.org/effects_of_water_pollution_on_fish.pdfIn PDF document text
    • https://cdn.sqhk.co/lagazowasobo/d3jeogd/recommendation_letter_template_for_company.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450242/normal_5fe94e9f28cd1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459479/normal_605576e1b237a.pdfIn PDF document text
    • http://duzeliwuk.iblogger.org/glossary_of_usage_definition.pdfIn PDF document text
    • https://cdn.sqhk.co/jenetuwuda/kgdyMXx/driving_problems_with_dementia.pdfIn PDF document text
    • https://cdn.sqhk.co/mujawiru/axKJEic/tunibekexatimofadafapite.pdfIn PDF document text
    • https://cdn.sqhk.co/xidatelo/gdDgjij/dialer_apk_mirror.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tobizexajivuvob.epizy.com/computer_network_ppt_templates_free.pdfIn PDF document text
    • http://mowilutom.epizy.com/apa_format_reference_generator.pdfIn PDF document text
    • http://jitumevadegoz.rf.gd/xuxukupixodazuronavavevu.pdfIn PDF document text
    • http://komoxam.rf.gd/69034753910.pdfIn PDF document text
    • http://meduzifovum.epizy.com/zorinajanajevudew.pdfIn PDF document text
    • http://rexagoxew.epizy.com/careless_whisper_alto_sax.pdfIn PDF document text
    • http://kigizeme.epizy.com/pokemon_fire_red_gameboy_advance.pdfIn PDF document text
    • http://jazupizewatabal.epizy.com/calgary_zoo_map.pdfIn PDF document text
    • https://s3.amazonaws.com/tiduro/heat_transfer_solutions_houston_tx.pdfIn PDF document text
    • http://zewogukanonudut.epizy.com/awadhesh_premi_ka_video_dj.pdfIn PDF document text
    • https://s3.amazonaws.com/livivuvuwugeb/82863838856.pdfIn PDF document text
    • https://s3.amazonaws.com/bomifabipi/23183964383.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_off0000f369.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF369 5608 bytes
SHA-256: e5679544cbcd015adbb4646a2846853efdd2b38a057cb16266fc491f2bdcede5
font_01_sfnt_off000106c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106C2 10460 bytes
SHA-256: b496603edf3d5fd7471aab2f2700324ea0739df418fc931be6ce1fce1f5a188c

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