Malicious PDF — malware analysis report

Static analysis result for SHA-256 59f350305a9fdb7b…

MALICIOUS

PDF

88.7 KB Created: 2021-03-22 22:15:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 7592a1bbe3b1f8c8f976d9c6cbf3fed6 SHA-1: 503459d853fa44ca02a2e17370675d3338a51f25 SHA-256: 59f350305a9fdb7bcd7a29e6258602e808f8773de497330067bf950848705e98
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 0.9994

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://baarspo.ru/wix?keyword=diana+scott+ccsf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4424405/normal_60566531d9db6.pdfIn PDF document text
    • http://shoop-fm.ru/equalizer_bass_booster_apkqz9hr.pdfIn PDF document text
    • https://kogijusixi.weebly.com/uploads/1/3/5/3/135312463/xonigevokipedef_belupukenen_kiweduxu_bojugujom.pdfIn PDF document text
    • http://inostrana.com/watch_prince_and_me_online_freefqkzf.pdfIn PDF document text
    • http://businessmentality.com/botigigamasuto0uye.pdfIn PDF document text
    • http://devlp.design/filsafat_manajemen_pendidikan_islamgnpwb.pdfIn PDF document text
    • http://pestore.pro/vw_tiguan_transmission_fluid_check23mma.pdfIn PDF document text
    • http://biolinkus.me/gonetestcgi.pdfIn PDF document text
    • http://prizinsta.online/48130163426gxz79.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385633/normal_6000773a64a99.pdfIn PDF document text
    • https://kafubururi.weebly.com/uploads/1/3/4/2/134235359/gepomol.pdfIn PDF document text
    • http://rmk4sale.xyz/pellegrino_artusi_librodnb8g.pdfIn PDF document text
    • http://purpless.vip/tafsir_ibn_kathir_english_buy_online_indiahempz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490722/normal_601b31d709748.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4483349/normal_5fc7db3c9423b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://9849c7ec-8b19-4b81-9a64-db2537ea7c40.filesusr.com/ugd/97b1c0_9463b4956e7b4e85bc65babdacc3d212.pdf?index=trueIn PDF document text
    • https://6e345194-e688-4037-aa24-2ff230a16836.filesusr.com/ugd/ce9fe1_54c8827dcfa14b86b7ce214d049e7bb2.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/947bf576-fe98-4c23-b5d4-87977332470c/venugat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/01ea3eca-f5a0-4368-b4a6-56820ba485a2/fuzzy_lookup_add-in_for_excel.pdfIn PDF document text
    • https://6843e3eb-5573-46e1-90a0-370cfc2b4a0d.filesusr.com/ugd/89b1bc_ec7a24555b8e4a64a7a8be0a8cf87925.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/66fe1e32-38c8-418c-a465-59a3fc5d20fd/what_does_rioja_pair_with.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d7b41a2-0272-45c5-8480-65db5ace96fd/is_cfa_the_hardest_exam.pdfIn PDF document text
    • https://4cd5a77a-be8d-44ba-8952-4177873115c4.filesusr.com/ugd/930050_d12b688a993046568162cf866ead7e2a.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_off00011bf0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BF0 4748 bytes
SHA-256: e2c1a11338610c540cd4e2184a06c15f2b2df04711dfc262bed2020eb1bdb151
font_01_sfnt_off00012c36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C36 12388 bytes
SHA-256: b5057a6ccf045c19bf082827724813d7998e1d593129fd9a75893a3110cb7fa6

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