Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9b637eece41e1ba…

MALICIOUS

PDF

68.0 KB Created: 2021-02-20 21:23:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 4cd8516b208b032b3a3b66a2b4ca78d5 SHA-1: 5464ff1ca4bfa8c4dacf7a94a2cce2c213f0642a SHA-256: e9b637eece41e1ba3107a3efe5e18a74d3cb8edc0294a4014b30359c011a4475
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or redirection scheme. The presence of a 'utm_term' parameter in one of the URLs further supports a phishing or SEO manipulation tactic.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://maypoin.ru/123?utm_term=william+wilson+md+idaho+falls PDF link annotation
    • https://xadajosawot.weebly.com/uploads/1/3/1/6/131636584/ginimofevusitaruva.pdfIn PDF document text
    • https://cdn.sqhk.co/koditisalupe/OgduHgd/34851809339.pdfIn PDF document text
    • https://nudadisaxoge.weebly.com/uploads/1/3/4/0/134018155/selaji-sasudewobi-simivebupirife-xisujekis.pdfIn PDF document text
    • http://biomanua.website/823804729614f63f.pdfIn PDF document text
    • https://gadetuzajuvi.weebly.com/uploads/1/3/4/8/134850054/baa360.pdfIn PDF document text
    • http://trynutra.shop/hp_pavilion_15_p051us_reviewdhlpv.pdfIn PDF document text
    • https://pumutetigowon.weebly.com/uploads/1/3/4/6/134699291/vuragujimetezag-sugije-fonetopozikijev-womoruregawuwiz.pdfIn PDF document text
    • http://reduslim-eu.site/what_foods_are_gluten_free_at_starbuckshti8a.pdfIn PDF document text
    • https://doxuginuf.weebly.com/uploads/1/3/5/3/135346615/5476780.pdfIn PDF document text
    • http://lozhobelir.space/82616028857ciqpw.pdfIn PDF document text
    • http://krokoboko3.xyz/actualizacion_android_auto_mazdazin4m.pdfIn PDF document text
    • https://cdn.sqhk.co/mifijizudi/cicjhji/2276550538.pdfIn PDF document text
    • https://fiwebafifike.weebly.com/uploads/1/3/4/8/134885554/9707826.pdfIn PDF document text
    • https://vuvuzuvikedatun.weebly.com/uploads/1/3/4/5/134529562/merixililu.pdfIn PDF document text
    • http://load-bcp.com/28165148954fqna5.pdfIn PDF document text
    • http://kernig.store/printable_fortune_teller_template8t7yq.pdfIn PDF document text
    • https://loxoxonejuk.weebly.com/uploads/1/3/4/6/134684666/wupupewivefip.pdfIn PDF document text
    • http://bestsalestoday.xyz/bokeh_effect_app_android1je9i.pdfIn PDF document text
    • https://cdn.sqhk.co/novozefox/Mihojhj/liga_pro_manager_pc_futbol_7.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://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_off0000c0d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC0D0 4748 bytes
SHA-256: ec91d52584bce97e01670de7af13f7378eb789d800abf8f10793fddd2234ec94
font_01_sfnt_off0000d0c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0C5 10504 bytes
SHA-256: 93ee14cc7c7244a1ed07df01631a54aaad49ace8acd1986089c5ee6699518f77
font_02_sfnt_off0000f4bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4BC 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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