Malicious PDF — malware analysis report

Static analysis result for SHA-256 2cdd2c9d08676617…

MALICIOUS

PDF

183.7 KB Created: 2021-04-03 01:54:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 7f6cd597944864d701ca5913b7ca6f21 SHA-1: 96016bb8b95555349e325fbf27f72de7fca74e46 SHA-256: 2cdd2c9d086766170595985fa0bb2cd0c687f7feecf248eee59e2392904166b4
134 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or trojan threat. It contains numerous external URIs, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious content. The heuristic 'SE_URGENCY_LURE' further supports a phishing attempt, although the document body itself is heavily obfuscated and does not provide direct textual clues.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://dugedepap.ru/award?keyword=purified+water+usp+monograph+pdf PDF link annotation
    • http://zubiki.top/45519099047nb90s.pdfIn PDF document text
    • http://instofficial.online/search_engine_optimisation_for_dummiesxodmn.pdfIn PDF document text
    • https://tunawirivam.weebly.com/uploads/1/3/1/4/131437064/vasixotaxav.pdfIn PDF document text
    • http://xagevogewa.medianewsonline.com/electrocardiograma_12_derivaciones.pdfIn PDF document text
    • http://ruwemipuwev.mypressonline.com/miwiba.pdfIn PDF document text
    • https://vujipobunovopo.weebly.com/uploads/1/3/5/3/135324227/dd1cd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422877/normal_5fcf421e95a16.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373797/normal_5fe9c3d15572c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4468530/normal_5fe3a2c2520a4.pdfIn PDF document text
    • https://letezinujafi.weebly.com/uploads/1/3/4/9/134901841/8022394.pdfIn PDF document text
    • http://wejnpowk.space/13375788331vq560.pdfIn PDF document text
    • https://tusujowifavenag.weebly.com/uploads/1/3/1/4/131453847/vetesiletod_bexuf_jabazaf_tapowisuda.pdfIn PDF document text
    • https://gazolono.weebly.com/uploads/1/3/4/7/134721713/b7c19b2bf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404725/normal_6037cdef388b6.pdfIn PDF document text
    • http://rcasino.info/160944565713njdw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jenisozazewubo/demonstrative_pronouns_exercises_grade_6.pdfIn PDF document text
    • http://ratobewiwigu.atwebpages.com/vehicle_bill_of_sale_texas.pdfIn PDF document text
    • https://77bc4ea4-de20-41c0-a463-a5315db628d9.filesusr.com/ugd/2c69e3_713b7f79b08d47caaf30d3c9d470b254.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wexoteluwag/47265398728.pdfIn PDF document text
    • https://s3.amazonaws.com/suxugipipolazog/how_do_i_adjust_time_on_my_g_shock.pdfIn PDF document text
    • https://s3.amazonaws.com/wutogugej/family_tree_chart_template_microsoft_word.pdfIn PDF document text
    • https://f74ea38a-ab8d-49a0-8d31-9a1d7ce64423.filesusr.com/ugd/5ceade_d0ce2282be6c496eb11c697e1050e5ed.pdf?index=trueIn PDF document text
    • http://vekejuf.atwebpages.com/monewasixelajarixosir.pdfIn PDF document text
    • https://s3.amazonaws.com/bejexe/zifeviserupomibimefi.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_off00029637.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x29637 5516 bytes
SHA-256: cf00fa27bc37f9fa3990ad3ebe8a0c5a862484ac5cc042e9550c904636432fd7
font_01_sfnt_off0002a8e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2A8E2 11244 bytes
SHA-256: fdc7ff1d4c158353fbcb3dae4680c25115e83bc2d90bdc6ee5eb03d404114733

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