Malicious PDF — malware analysis report

Static analysis result for SHA-256 993da28062332b88…

MALICIOUS

PDF

76.5 KB Created: 2021-04-06 10:57:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: aa1d3dbeb75d17fb0940e8578f0c17a3 SHA-1: 644d0f56dbacfee7a9f88f10a5fd8b432987218c SHA-256: 993da28062332b888855af942a268891d40f037dbe607c48f00a38e959ebaca4
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF document was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm designed to redirect users to malicious content or phishing sites. The presence of 'utm_term' parameters in some URLs indicates a potential phishing or scam campaign.

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
  • 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=troy+bilt+riding+lawn+mower+oil+capacity PDF link annotation
    • http://rutonujak.iblogger.org/lonukagosejagelakepa.pdfIn PDF document text
    • http://zowutelufuga.iblogger.org/portable_dvd_player_reviews_consumer_reports.pdfIn PDF document text
    • http://uptodate.site/libro_amar_o_depender_resumen8i23o.pdfIn PDF document text
    • http://spainwow.pro/bit._ly_nyone_appw3hsx.pdfIn PDF document text
    • http://tesar-krd.ru/helvetica_bold_truetype_font7m4uz.pdfIn PDF document text
    • https://wufewevaso.weebly.com/uploads/1/3/1/4/131453291/gexezez.pdfIn PDF document text
    • http://eglo.club/lagawe_lu_jab_lipstick_mp3_download0nf6y.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465263/normal_6039c8aaa5793.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378425/normal_6010934ad5bfd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370744/normal_5fd1c83ab06f4.pdfIn PDF document text
    • http://afracheat8.xyz/phoenix_arizona_weather_january_2020gl81z.pdfIn PDF document text
    • https://gomemaliji.weebly.com/uploads/1/3/4/0/134040406/tegubobaxabu.pdfIn PDF document text
    • http://rozefuzapotor.iblogger.org/49435157143.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455174/normal_604e59387dc1e.pdfIn PDF document text
    • http://kifawajunob.iblogger.org/56811493137.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376088/normal_601fc8c217006.pdfIn PDF document text
    • http://kamini33.ru/the_secret_garden_2020_cast_listol89t.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://5f384421-c3d0-4b4c-85a6-d3745974446f.filesusr.com/ugd/40006b_c9a8c7c2cfff4496818ac28806b6fbb8.pdf?index=trueIn PDF document text
    • https://d5fd0048-bb8d-45a1-ba21-28d1cb0b7162.filesusr.com/ugd/5e8de6_a041efc37e4343f8ac8f55defb90a3f2.pdf?index=trueIn PDF document text
    • https://cb70cc59-2297-49c3-b7e2-2ac7e26e28d4.filesusr.com/ugd/4479ed_756f8b3963554d20b14d7860815bcbaf.pdf?index=trueIn PDF document text
    • https://73e25548-3913-4bbb-aa69-a1b25f69568d.filesusr.com/ugd/cece23_28241f12ed1642bc9e55b46fa4680832.pdf?index=trueIn PDF document text
    • http://lobawapulovad.epizy.com/58493705369.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_off0000ee07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE07 5496 bytes
SHA-256: 84e38e0dcf18ada67e0dad24bc0eecb53682be68f0cddbd6c0104bf3d0a02a94
font_01_sfnt_off000100bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100BB 10608 bytes
SHA-256: 11304cec1b27c7dedfc5499b80996f4519e4809a6643f0406446d4f951af4a8f

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