Malicious PDF — malware analysis report

Static analysis result for SHA-256 503fbcf15680d3b4…

MALICIOUS

PDF

68.4 KB Created: 2021-02-15 05:44:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: c84b40b05475682e366541bc9f8c9122 SHA-1: 597035b55bb864932ccd89739dd12e76d3c50dcc SHA-256: 503fbcf15680d3b4d6a2d58ac6876d981ed272779d16c737bf004734567bde2d
244 Risk Score

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/wb?keyword=naming%20compounds%20worksheet%20with%20answers%20pdf In PDF document text
    • https://cdn.sqhk.co/kiwametin/cUEmhbb/texegufubigosijugaleti.pdfIn PDF document text
    • https://vokarojunez.weebly.com/uploads/1/3/2/6/132696330/ac998c5626f.pdfIn PDF document text
    • https://jimurapixow.weebly.com/uploads/1/3/5/3/135399705/zalatiliwupube-namenelivomute-bapux.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420747/normal_5ff15da9353d2.pdfIn PDF document text
    • http://larts.digital/99229133905n6075.pdfIn PDF document text
    • https://moxiwomalupul.weebly.com/uploads/1/3/4/5/134598527/8087013.pdfIn PDF document text
    • https://cdn.sqhk.co/josedinis/PggeJji/grand_gangster_vegas_crime_city_mod_apk.pdfIn PDF document text
    • https://sidopaxabu.weebly.com/uploads/1/3/1/3/131398246/79bbb8665e3880.pdfIn PDF document text
    • http://alcexpress1.xyz/slope_intercept_form_to_point_slope_formb9qmz.pdfIn PDF document text
    • http://instofficial.online/enyel_de_los_santos_scouting_report2r9tx.pdfIn PDF document text
    • https://cdn.sqhk.co/wojeberupe/M3iePhh/can_you_escape_the_room_11_level_47.pdfIn PDF document text
    • https://cdn.sqhk.co/wojusipi/Fidgcgf/earthquake_today_los_angeles_4am.pdfIn PDF document text
    • https://xemibunadagom.weebly.com/uploads/1/3/4/6/134639404/73eb7ac3f.pdfIn PDF document text
    • http://boomua.site/gukubewebawsz2cx.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xusoloturokuk.epizy.com/equilibrium_constant_lab_answers.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

Related samples 8

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_off0000cda5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDA5 5664 bytes
SHA-256: 09523723fbc78a9884905723c3d1cdb43340e705b75c51b1d82e7aa64e7af462
font_01_sfnt_off0000e0e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0E5 10520 bytes
SHA-256: 71e33c474ea4b8bee07d42b1219b6b3e5aaf468ab4ca89824b559b6e23854a54

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