Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1850f119010d842…

MALICIOUS

PDF

75.5 KB Created: 2021-03-19 22:19:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 75ed097731c3cd3837ec929aedffa562 SHA-1: f79c4524c6266d75f6c02bd2e459bb9f6c06e745 SHA-256: b1850f119010d842ff27d9cccc83a22bea876216abfcc3433c1585b0cfc362b4
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 0.9991

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://xezojetit.ru/wix?keyword=andre+galvao+drill+to+win+pdf+download PDF link annotation
    • https://nefatalij.weebly.com/uploads/1/3/2/7/132740339/saxoveworibiva.pdfIn PDF document text
    • http://redofokotab.sportsontheweb.net/commercial_vessel_flare_requirements.pdfIn PDF document text
    • https://cdn.sqhk.co/zifalulog/cAgfnhf/hurricane_warning_flags_for_sale.pdfIn PDF document text
    • http://lugodapamaj.mygamesonline.org/36683300994.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415055/normal_6049b4bb8a24b.pdfIn PDF document text
    • https://cdn.sqhk.co/nevupediwix/jjcqa05/nojikadiwagakituzijofose.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387816/normal_605141d349a54.pdfIn PDF document text
    • http://xonigej.mypressonline.com/how_to_become_stock_market_research_analyst.pdfIn PDF document text
    • http://bapatavusirave.mygamesonline.org/70125570260.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375350/normal_5fffb1f22204f.pdfIn PDF document text
    • http://kavelokafozi.medianewsonline.com/tertulliano_apologetico.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478946/normal_602730e391295.pdfIn PDF document text
    • https://xizenarinirogav.weebly.com/uploads/1/3/1/4/131437147/3841215.pdfIn PDF document text
    • https://cdn.sqhk.co/sosobita/c07egfO/6701365666.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424029/normal_6008e5f23e9f4.pdfIn PDF document text
    • http://mavaxur.mywebcommunity.org/reflection_and_refraction_notes.pdfIn PDF document text
    • https://netiwolofud.weebly.com/uploads/1/3/1/4/131438008/gazuriluxajototaz.pdfIn PDF document text
    • http://nejupike.mygamesonline.org/21032047516.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/a09d92d8-960d-4030-bdcf-220c3cceb917/fotulozetupizukikerado.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/47717f0d-8515-45b0-a21f-1d994701476e/memekokezeva.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bb99f84c-f205-4d2f-8389-326452816dd8/fusapepurafodup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3cc73d21-677f-43ca-8885-f848ca6bc6ae/28938833094.pdfIn PDF document text
    • http://pizitibasowu.atwebpages.com/bomosibamewel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a6b96c73-3895-4770-ae8b-d698ccb28aab/xafewivimolutil.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_off0000e08f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE08F 5172 bytes
SHA-256: b6dc5347069aa107edd494cbf547bee99c05e89a1be98971bc887332d9489102
font_01_sfnt_off0000f252.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF252 15304 bytes
SHA-256: 6717e62d405fb0d8ff592cde996f81b39d92750a1c5831c68b2e75944055c566

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