Malicious PDF — malware analysis report

Static analysis result for SHA-256 67503b5d1efcf820…

MALICIOUS

PDF

77.0 KB Created: 2021-01-21 20:41:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 9f65491f4c0be3a35f6b5c90b71fabf3 SHA-1: d48e3a3b3312b7261d8235348ce7012be841a1d3 SHA-256: 67503b5d1efcf820ce15cad3e606df5fca412cc9d57f0f0c0ca8ca3b737b880a
184 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with at least one identified as a malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The presence of embedded URLs suggests an attempt to lure the user to external malicious content, aligning with spearphishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 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://traffking.ru/123?utm_term=6-24x50+scope+vortex In PDF document text
    • https://cdn-cms.f-static.net/uploads/4501632/normal_5fd3a0f141a4d.pdfIn PDF document text
    • https://cdn.sqhk.co/kefesizo/Smgeygi/vimekififoseruzelugoket.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474478/normal_5fd1385a1b40e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476577/normal_5ff3cd18787a5.pdfIn PDF document text
    • https://xigokujote.weebly.com/uploads/1/3/4/6/134649591/fimiganemakek.pdfIn PDF document text
    • http://zubosoxi.22web.org/76744807663.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4468843/normal_5fc5b1d4b3d85.pdfIn PDF document text
    • https://gazuxajolitivik.weebly.com/uploads/1/3/4/7/134770387/6233918.pdfIn PDF document text
    • https://pubedazemel.weebly.com/uploads/1/3/4/8/134870130/d3b7330667.pdfIn PDF document text
    • https://cdn.sqhk.co/zodenizekija/3Aa9W9i/73035340801.pdfIn PDF document text
    • https://cdn.sqhk.co/nadizolobe/jhSIjje/my_etisalat_afg_app.pdfIn PDF document text
    • http://penerete.66ghz.com/dotufekedijimixenikop.pdfIn PDF document text
    • https://nisivijuwowog.weebly.com/uploads/1/3/0/8/130813757/fifedosuvoruzo.pdfIn PDF document text
    • https://cdn.sqhk.co/guwuweri/5YwKDju/tool_kit_without_drill_machine.pdfIn PDF document text
    • https://nixozetite.weebly.com/uploads/1/3/0/8/130873825/6503972.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://toxiramagelovit.epizy.com/sample_case_study_analysis_report.pdfIn PDF document text
    • http://karifopiti.epizy.com/archipelago_presets_free.pdfIn PDF document text
    • http://togipumenotu.epizy.com/54509823747.pdfIn PDF document text
    • http://filamejukak.epizy.com/70947983271.pdfIn PDF document text
    • http://wumevagijez.epizy.com/latale_w_treasure_hunter_guide.pdfIn PDF document text
    • http://kenefokugoxetu.rf.gd/free_printable_40th_wedding_anniversary_invitation_templates.pdfIn PDF document text
    • http://toduwez.epizy.com/definition_of_health_psychology.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_off0000e844.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE844 5388 bytes
SHA-256: a2600ad32a8aa42e47ca56c0de25cd85cc8e2804327e963c608a69d963c1256c
font_01_sfnt_off0000facd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFACD 14224 bytes
SHA-256: b04ff0744a6b158c8435ae38f33502ffb8901b3e52c07f4f36fa7f554123a695

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