Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2c4973dcce8a755…

MALICIOUS

PDF

77.3 KB Created: 2021-03-17 02:04:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 5195d2e8bf7938ebed41c7b6b411d579 SHA-1: 7009a286c43b7df56a025b006b58e1522904976c SHA-256: b2c4973dcce8a755a92f45d7dee6e29ad79bfe9908b48b5cebe141fc5a790a52
186 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9998

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://fokemale.ru/strik?utm_term=john+deere+lawn+tractor+price+list PDF link annotation
    • http://websecurer.tech/18457573481g8y0q.pdfIn PDF document text
    • http://sumapewub.getenjoyment.net/salin.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369332/normal_604f9d203007a.pdfIn PDF document text
    • http://italdom.fun/shin_megami_tensei_gba_rom_englishae2dj.pdfIn PDF document text
    • https://cdn.sqhk.co/tuwetebep/uifBgiy/vamanugasevi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4500893/normal_5fdf21cc25f51.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379035/normal_5fedba60cac2e.pdfIn PDF document text
    • https://cdn.sqhk.co/lenawemijixe/QAmjcia/27059410090.pdfIn PDF document text
    • https://cdn.sqhk.co/nikajovefer/ieGqheK/11161385933.pdfIn PDF document text
    • http://daisywobzr.rest/tozababufuduga3c4b.pdfIn PDF document text
    • https://cdn.sqhk.co/xipapotug/hbCGias/b_tech_malayalam_full_movie_cinemavilla.pdfIn PDF document text
    • https://cdn.sqhk.co/jurugaguvedu/vjgjgjF/rudeliwax.pdfIn PDF document text
    • https://cdn.sqhk.co/pazaxefuma/icghMif/hd_camera_pro_1._5_apk_free_download.pdfIn PDF document text
    • http://potozafit.medianewsonline.com/skf_wheel_bearing_catalog.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sadoboxijowem.myartsonline.com/25824269255.pdfIn PDF document text
    • https://63d876aa-455f-4c41-9c38-50747f3e0b95.filesusr.com/ugd/a220d5_34d5afc9ed464fdd9a0f4ee96e5380e0.pdf?index=trueIn PDF document text
    • https://737bf953-b780-43bc-8af0-312ed5328a40.filesusr.com/ugd/017c44_5cec91f8b97548db9c1586a33a9c114d.pdf?index=trueIn PDF document text
    • https://28ae28a3-27cc-4d38-be83-0de1f6925f83.filesusr.com/ugd/454016_b09e870a333c4c62aa03c9c12a98e3e0.pdf?index=trueIn PDF document text
    • https://4dcfe184-cd6c-48f8-9f23-5461c743a1d4.filesusr.com/ugd/cc8533_f920b765642647dab59b521c811050de.pdf?index=trueIn 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_off0000f04f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF04F 5240 bytes
SHA-256: aba4ee0bea482302b51d3fb56ffe677f784ed1845b02090bfecce365f1409d9d
font_01_sfnt_off0001022c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1022C 11200 bytes
SHA-256: 1de0ba3fb86e2d479c35e5b030ce8b12a21f73b1c8104d67e39716c22b6d01e0

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