Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d4e62507ba9d3ba…

MALICIOUS

PDF

84.5 KB Created: 2021-04-02 08:22:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: cd9733519cf54def106cef5644287841 SHA-1: db72dbf8fa15feb720eb853df38c0cb109180c3b SHA-256: 0d4e62507ba9d3ba99b0e6230f053db1e27009a3dee69b0a4faf8be0d2761ba3
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 0.9996

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://botokaw.ru/strik?utm_term=control+soundbar+with+apple+tv+remote+app PDF link annotation
    • http://vkysnaya-eda.site/a_streetcar_named_desire_themes_and_quotesxhx3m.pdfIn PDF document text
    • https://cdn.sqhk.co/silakozafi/bc6geib/34065854058.pdfIn PDF document text
    • http://bumumapa.mypressonline.com/sivexozadetewomoje.pdfIn PDF document text
    • http://sallehq.xyz/7689285623054qyt.pdfIn PDF document text
    • https://cdn.sqhk.co/timadupak/haid1qj/thrifty_car_rental_airport.pdfIn PDF document text
    • http://carinsusa.info/spectrum_math_workbook_grade_8_free92cvz.pdfIn PDF document text
    • https://cdn.sqhk.co/wanazofemuvu/cnhaiBA/slow_motion_video_editing_software_free.pdfIn PDF document text
    • https://cdn.sqhk.co/pugirunosamo/kibwzZf/mefage.pdfIn PDF document text
    • https://cdn.sqhk.co/pifonode/hj1xjjN/58037272733.pdfIn PDF document text
    • http://wersita.space/fopageloqybjq.pdfIn PDF document text
    • http://womuvizitina.mywebcommunity.org/la_fin_des_actes_administratifs.pdfIn PDF document text
    • http://jesofoma.getenjoyment.net/53644505175.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370270/normal_603b8a95b8226.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366321/normal_600b3fe56852b.pdfIn PDF document text
    • http://gvidilon.ru/what_is_the_angelus_prayer_about18fx7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pizuzol.onlinewebshop.net/best_architecture_software_2020.pdfIn PDF document text
    • https://8ab8d0a6-ebcf-4503-ac90-3c5d9a0926ce.filesusr.com/ugd/8585d4_bc1f45df90944426ab9a78d519af2aa5.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gagagakigibapo/how_to_make_healthy_oatmeal_for_weight_loss.pdfIn PDF document text
    • https://d03ec42c-8b93-48d3-a61e-9aee396c0db4.filesusr.com/ugd/1e557c_98806719342c443da047e5bf97b69d0e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/nigimul/top_chatbot_app_android.pdfIn PDF document text
    • https://4454cc88-256b-48ad-9013-c0414c72072d.filesusr.com/ugd/67e251_c3a6c89e2fdc4947ac0b8b5595c69956.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000127f9.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x127F9 18232 bytes
SHA-256: 6254a830681faea98e8015fdd41fc178996ee1b28823b348fadee292d6ac0ad6
font_00_sfnt_off0000f111.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF111 5396 bytes
SHA-256: 3c461b2eb1fa5c62bff1e4970bef035a2fae89c540252012131b8b78a0323735
font_01_sfnt_off0001034a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1034A 10716 bytes
SHA-256: 2e4c975a43416cc695cbb9588137c504e89b122575513b494fc405131a2b6e67

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