Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ae51fabf3f469f1…

MALICIOUS

PDF

76.1 KB Created: 2021-04-07 20:10:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 44875a7ad6710cf084d95b7131c9e2db SHA-1: 14fb81dc5a7c834e3561e0d8a5fa3df8bdc17f15 SHA-256: 3ae51fabf3f469f1e6b62805096e4d2279571c8d2180f1c5e341ae90ba9a22e4
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 0.9997

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://bologen.ru/strik?utm_term=ice+breaker+questions+for+employees PDF link annotation
    • http://tokio-2020.fun/wosomop93f81.pdfIn PDF document text
    • http://blognews.top/nikipepegaverunefajozax2danu.pdfIn PDF document text
    • http://goodsun.fun/25194078547agj9z.pdfIn PDF document text
    • http://itash.space/ribixitobudujaperikoteto4ssrk.pdfIn PDF document text
    • http://alania365.ru/the_black_hand_chris_blatchford3wpti.pdfIn PDF document text
    • http://reweder.site/critical_action_gun_strike_ops_gameplay97nct.pdfIn PDF document text
    • http://artemk.ru/91923201182g6ajk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465010/normal_5fd063c42bf73.pdfIn PDF document text
    • http://letnesil.xyz/cristo_el_anarquistapkyf5.pdfIn PDF document text
    • http://mivejuvididu.66ghz.com/fifty_shades_of_grey_3_soundtrack_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467945/normal_6015f23b93f75.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bumemelowogo.rf.gd/assassin_s_creed_odyssey_guide.pdfIn PDF document text
    • https://3dcfbd4a-ef33-49dc-a04a-0aaf5307c30d.filesusr.com/ugd/b47706_1a96b519b767405b95c68f93c008c657.pdf?index=trueIn PDF document text
    • https://5be7aec3-7d66-433b-ae1d-2bfb807ddf2a.filesusr.com/ugd/24deb6_b80d2d5254204ce2937724c54818e244.pdf?index=trueIn PDF document text
    • https://dd7ee03d-3646-4e01-a1e1-4c0a7e2c9e57.filesusr.com/ugd/d7ba0f_9064f78d1124449fafae7be7dbad090d.pdf?index=trueIn PDF document text
    • https://71f68c9c-1037-483c-a0ca-f268b7ddd3c8.filesusr.com/ugd/87fdc7_b364c56b1f234f88847a497e4ba611da.pdf?index=trueIn PDF document text
    • http://zalowakudedakov.rf.gd/do_subway_have_any_specials.pdfIn PDF document text
    • http://golofup.rf.gd/18065398969.pdfIn PDF document text
    • https://081e7fb2-604d-424b-9b75-a58d54a71a44.filesusr.com/ugd/abd6ea_a677c17bf68f484ca1952d70b93617bc.pdf?index=trueIn PDF document text
    • http://nisuxukiw.epizy.com/hp_laserjet_2100_m_tn_driver_download_for_windows_7.pdfIn PDF document text
    • https://b6c9d0de-81a1-4db9-ab7d-8a95af9e63d6.filesusr.com/ugd/b28ae2_32b4d554708a48349b11b47e6b60973d.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

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_off0000ebd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBD8 5532 bytes
SHA-256: 2632e6e78b57b6fb1d3455b8c82d335cd31d3acbaa0e6baafe4c975181f1336c
font_01_sfnt_off0000fea2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEA2 11012 bytes
SHA-256: c7f51e2bf314b8ffbf569dcfac6a133f17c63603092359524e5bc0ce2b44bf49

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