Malicious PDF — malware analysis report

Static analysis result for SHA-256 3895861a2144a6cf…

MALICIOUS

PDF

76.2 KB Created: 2021-05-06 17:32:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 57033dd617025af2d5ce226a40cdd829 SHA-1: dadc023ff5ee784a1e2d545cdf1047b2b31ee308 SHA-256: 3895861a2144a6cf388d785dd92a7ff3de6ce817e0777a01cdbc917180dde768
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 5

  • 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 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://xezojetit.ru/strik?utm_term=sunbeam+bread+maker+bm2500+recipes PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4404497/normal_606d93861dfb1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481065/normal_602b246679e90.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499999/normal_6044f72bca6f1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477138/normal_5fe011988bdbe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490371/normal_6017109578947.pdfIn PDF document text
    • http://gaydating.world/avakin_life_generatorcykfc.pdfIn PDF document text
    • http://sanatoriy-izumrudny.ru/ping_pong_lessons_san_diegogk0uh.pdfIn PDF document text
    • http://choosemadam.site/36429626990norpd.pdfIn PDF document text
    • http://bitcoins-profits.com/lethal_white_galbraithkechu.pdfIn PDF document text
    • https://cdn.sqhk.co/vekosozob/gcjji8i/rajouri_garden_market_map.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457005/normal_5fc889ba2a6e1.pdfIn PDF document text
    • http://keligekixebar.22web.org/best_movies_site_telugu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427523/normal_603324078b4f1.pdfIn PDF document text
    • https://cdn.sqhk.co/bugininaxi/lAciLij/tefamomenowusajadagane.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412905/normal_6021c9e293850.pdfIn PDF document text
    • http://novawepe.iblogger.org/75189908134.pdfIn PDF document text
    • http://indohealth365.online/birthday_cake_images_for_boy_babysx91e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413475/normal_5ff218afa0aac.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mejesikiwabez.epizy.com/ps3_emulator_apk_gta_5.pdfIn PDF document text
    • http://miwufojo.epizy.com/bokaju.pdfIn PDF document text
    • http://wewejozajukenat.rf.gd/dovesamiluxelizufu.pdfIn PDF document text
    • http://negubikalijewu.epizy.com/33456850710.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_off0000eb14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB14 5892 bytes
SHA-256: 796fde270a82c19567cf0fe1c0e8579592b7fd9a7e98cb953930bc8708fa9d09
font_01_sfnt_off0000ff07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF07 10712 bytes
SHA-256: 3f9cf5d081c59cf1d0334cae0c80e1e3d3aeb60916c5af3ee2eee1ef23df801c

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