Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a42c3be1afdbc7f…

MALICIOUS

PDF

100.8 KB Created: 2021-03-15 05:43:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: d0dfc971a58dcad4f804890f0d4b2124 SHA-1: b9be7d6883c27e67a722807d450516427db30e92 SHA-256: 9a42c3be1afdbc7f961ed1bcfa81bbeb92f1c1c181b2911bb84f625a675ede17
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 0.9989

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://soxebez.ru/123?utm_term=characteristics+of+performance+management+slideshare PDF link annotation
    • https://nifudosuv.weebly.com/uploads/1/3/4/0/134040563/vagabaf.pdfIn PDF document text
    • https://gipazekafasulal.weebly.com/uploads/1/3/4/6/134600210/9608546.pdfIn PDF document text
    • https://cdn.sqhk.co/dasofuduveje/jcgcihn/52390356161.pdfIn PDF document text
    • https://naziwimirup.weebly.com/uploads/1/3/4/3/134371197/5422d0c26154eb2.pdfIn PDF document text
    • http://bozidik.22web.org/fuji_hakone_pass_japan_guide.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447085/normal_602d85745d252.pdfIn PDF document text
    • https://cdn.sqhk.co/borefigux/jbsFgHF/alienware_monitor_aw2518hf_driver.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444117/normal_5ff6aaf12cb29.pdfIn PDF document text
    • https://cdn.sqhk.co/ruxuzobisu/ihjfhax/stickers_for_hydro_flask_vsco.pdfIn PDF document text
    • https://cdn.sqhk.co/rosojolude/ji6hhJ8/wugufarir.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416656/normal_5fc66d1e834e5.pdfIn PDF document text
    • https://cdn.sqhk.co/jotepomi/je7jjjj/kaiser_permanente_nursing_jobs_near_me.pdfIn PDF document text
    • http://xulubapatoso.scienceontheweb.net/what_constitutes_a_breach_of_trust_and_confidence.pdfIn PDF document text
    • https://joralonu.weebly.com/uploads/1/3/1/6/131607047/nolufuv-fuxevi-jagimi-magado.pdfIn PDF document text
    • http://tifetatujuvib.22web.org/36489156882.pdfIn PDF document text
    • https://vuzaruluweketex.weebly.com/uploads/1/3/4/4/134478477/xozona_mefakozoge_fodotelofivoxad.pdfIn PDF document text
    • http://lomidal.mygamesonline.org/how_to_factory_reset_onkyo_tx-nr609.pdfIn PDF document text
    • http://vutunema.mypressonline.com/52768820680.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403539/normal_6049771fdb9e3.pdfIn PDF document text
    • http://xufuxenu.mypressonline.com/fitegodavedizomiba.pdfIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/kezemiradigu/jafza_liquidation_report_format.pdfIn PDF document text
    • http://luzigipo.epizy.com/khadya_suraksha_yojana_form.pdfIn PDF document text
    • https://s3.amazonaws.com/wupixufekijax/masogixol.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00014152.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14152 2008 bytes
SHA-256: a81a52d688fa36e414029fb43941a1114a8c1bc6fffe5b6c117232b5a0a40bf2
font_01_sfnt_off00014aa4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14AA4 5476 bytes
SHA-256: b016df6756b60b53d571c6961df3f5c1e993b11895576d85659085e6ef08ee0b
font_02_sfnt_off00015d12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15D12 11724 bytes
SHA-256: c111469d18c199fc504a05ad873312c742f938623f183992b0c3823486bdd6c3