Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae71dd738d42ad37…

MALICIOUS

PDF

75.2 KB Created: 2021-04-05 20:10:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: c1a109889cef39fa46a45b82d51d2835 SHA-1: c54945cc4c22a1c453a4998e85969271858e9c5e SHA-256: ae71dd738d42ad3785bbf5ae605d49390318616f36fb6f9499def31110a70898
186 Risk Score

Malware Insights

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

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 0.9996

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://fokemale.ru/strik?utm_term=cannon+safe+master+reset+code PDF link annotation
    • http://fodefon.getenjoyment.net/pf_withdrawal_form_2020.pdfIn PDF document text
    • http://pink-echo.club/formel_1_heute_live_skygmvkk.pdfIn PDF document text
    • http://opit.space/86426277926k9kbf.pdfIn PDF document text
    • https://cdn.sqhk.co/wunokebewoz/FdxSKgi/38674183331.pdfIn PDF document text
    • https://cdn.sqhk.co/masunidupag/hbcrhjN/gafeki.pdfIn PDF document text
    • https://cdn.sqhk.co/gimexigerub/dnihjbK/nuzorovazibapexesupox.pdfIn PDF document text
    • https://fipoxojumudex.weebly.com/uploads/1/3/4/6/134649093/wawovatogal.pdfIn PDF document text
    • http://vodoroding.info/kuvebevageae4p2.pdfIn PDF document text
    • http://kokulotasuz.mygamesonline.org/cashless_policy_and_economic_growth_in_nigeria.pdfIn PDF document text
    • http://fitokaps.xyz/garmin_etrex_30_manualhpeb5.pdfIn PDF document text
    • https://punepisisu.weebly.com/uploads/1/3/4/7/134724768/501214.pdfIn PDF document text
    • https://cdn.sqhk.co/zozevuxe/dXkihPe/capital_iq_office_plugin.pdfIn PDF document text
    • http://anrostore.ru/integration_of_ex_cos_x_dxpb6qy.pdfIn PDF document text
    • https://weralafopibobal.weebly.com/uploads/1/3/4/3/134338927/7224643.pdfIn PDF document text
    • https://cdn.sqhk.co/javukapegami/Hgc1hb6/13499766609.pdfIn PDF document text
    • http://allfreebets.ru/forged_in_fire_show_netflix9qfsm.pdfIn PDF document text
    • https://cdn.sqhk.co/mawedabe/9hfhxig/segagevopejulifetolubuz.pdfIn PDF document text
    • https://cdn.sqhk.co/ragejeli/cOhjgjR/glider_flight_simulator_2020.pdfIn PDF document text
    • https://parafobosa.weebly.com/uploads/1/3/1/8/131857791/zozira-duwupaza.pdfIn PDF document text
    • http://hytri.com/singular_and_plural_nouns_worksheets_grade_62a0hk.pdfIn PDF document text
    • https://gumewutudeg.weebly.com/uploads/1/3/0/8/130813982/8b76c.pdfIn PDF document text
    • https://cdn.sqhk.co/gebemiwisero/0ElnMAV/jobikajolepefibejakogosan.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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

Related samples 6

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e586.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE586 5040 bytes
SHA-256: c61573a7e28169f6bddf0ac95047328ea2488bee006cfca595ef22966e938b9a
font_01_sfnt_off0000f691.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF691 11520 bytes
SHA-256: 98ab5dba08feb3f3ac32382238d6f974f7087134081b20d302a8a1d0a073c2ce

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