Malicious PDF — malware analysis report

Static analysis result for SHA-256 b106efc9b228cb64…

MALICIOUS

PDF

81.3 KB Created: 2021-03-30 02:09:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: d99d298d54be5289f5a55fe03c43e3d4 SHA-1: b0bc9120cfe4e82d0abfbddb7048f313c41b85cf SHA-256: b106efc9b228cb649e03dfa09572d58621346722b11e421d92cc2bfc25fe3640
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 0.9998

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/award?keyword=canaleta+parshall+dise%25C3%25B1o+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4479446/normal_60253e2409758.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478926/normal_5fd2cb22f1334.pdfIn PDF document text
    • https://xuzijobozu.weebly.com/uploads/1/3/1/4/131411245/rewuwoju_fagawalef_lenisoxes.pdfIn PDF document text
    • https://cdn.sqhk.co/pefisemise/ijBcWI0/best_voice_recorder_app_for_android_free_download.pdfIn PDF document text
    • https://vuxofuta.weebly.com/uploads/1/3/4/2/134235669/509835.pdfIn PDF document text
    • http://mebesovinu.22web.org/mipagenafajobo.pdfIn PDF document text
    • https://cdn.sqhk.co/pepupiribojo/ageHuid/moto_rider_go_mod_apk_latest_version.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445877/normal_6006556ab8022.pdfIn PDF document text
    • https://rowopubogapog.weebly.com/uploads/1/3/4/2/134234702/1188285.pdfIn PDF document text
    • https://cdn.sqhk.co/kugefiruxat/hbjdIJz/gimadorusedawekoxurexom.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460255/normal_5fccd2f5d9f14.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://e6e31949-ba74-43ae-8e0c-2243355e89fd.filesusr.com/ugd/69e259_c55f4f4f925f4929a0301a41e837aebd.pdf?index=trueIn PDF document text
    • http://vezenupu.epizy.com/temperamento_sanguneo_colrico_melanclico_fleumtico.pdfIn PDF document text
    • https://662517ce-f374-4037-aebd-99b1dbe00103.filesusr.com/ugd/0c4177_1777f2a610f94e06965db25f50c331da.pdf?index=trueIn PDF document text
    • https://ebed6276-6372-4ddf-adad-9a0fa504b99f.filesusr.com/ugd/805d2a_aaca0149198f430cb9b9c16ce26282bb.pdf?index=trueIn PDF document text
    • https://c480cc3d-c044-45b7-a7fa-747782367dcd.filesusr.com/ugd/a26f59_ac8ac5a147434b418f0cc2f6d18b22a0.pdf?index=trueIn PDF document text
    • https://80cb706b-a9cc-40e6-9cd2-ad5688d6c4a8.filesusr.com/ugd/c84a73_699f6655759b46d4a4c281809bce439c.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED3E 5152 bytes
SHA-256: 5d1d0fa182c41d870e1c3ee214052b4bbf8efe20d063b991792cebbe5f3d23d8
font_01_sfnt_off0000fe75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE75 13592 bytes
SHA-256: 645494401fa8a34d4ad6860f6a269a77858a75c87714b164e825602ff7054fd6
font_02_sfnt_off0001285f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1285F 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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