Malicious PDF — malware analysis report

Static analysis result for SHA-256 e65ccf2b7e7f5d3a…

MALICIOUS

PDF

78.5 KB Created: 2021-03-16 17:59:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: d91e707f2a6449523c68cdaf8ff31361 SHA-1: 5a572192d843b53f5bd2f32cc24001296bf240ba SHA-256: e65ccf2b7e7f5d3a12fd3ba0f4141702189f5eea75227242f939a3db4ca0aac2
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://gimoguvi.ru/123?utm_term=brookwood+cemetery+guided+tours PDF link annotation
    • http://pajelonagij.iblogger.org/sasudopanozuvix.pdfIn PDF document text
    • http://paworupuwiwitew.iblogger.org/89839879675.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403130/normal_60180a9b95d1e.pdfIn PDF document text
    • http://pozerebidilu.iblogger.org/95483957205.pdfIn PDF document text
    • http://kugewezebuvigiw.mygamesonline.org/is_audacity_good_for_recording_music.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417530/normal_5fca70cf2d72f.pdfIn PDF document text
    • http://kyhni.site/72130477057uw14w.pdfIn PDF document text
    • http://train-home.ru/10436230149i9jb3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454968/normal_6007f1e08db22.pdfIn PDF document text
    • http://kewokuxumuzig.medianewsonline.com/callate_y_besame_tonto.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488815/normal_600aeac576ed0.pdfIn PDF document text
    • https://cdn.sqhk.co/numovasovev/ujdsfib/2810655135.pdfIn PDF document text
    • http://alkostore.xyz/bomberman_3_retro_gamessy8ml.pdfIn PDF document text
    • https://cdn.sqhk.co/bexamajuw/Jrib2jf/71000669245.pdfIn PDF document text
    • http://govegejemoluf.iblogger.org/ball_python_snake_length.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://titugol.atwebpages.com/reasoning_ability_computer_aptitude.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/00f75d4c-80c4-4ab1-bb15-1aad9469ed72/69995928205.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0ae4ad4d-0864-43d0-a9b9-f584bef70287/pafilejofow.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/21ba09ef-114d-44f6-9a34-f881136b073d/what_are_the_different_types_of_emotional_appeals.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3fc7721b-52ad-46a7-9647-3f822425009f/xukinabugiref.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d2f5d16-b876-496d-a553-c33ee67c1074/professional_growth_plan_ideas_for_teachers.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_off0000f245.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF245 5324 bytes
SHA-256: ab027acbeaedf199f5d7cc12911bc253bbad2d5e1d6123daebf590a533b07b5f
font_01_sfnt_off00010472.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10472 11696 bytes
SHA-256: f5d3690584cd1ea0f827d0142e7af79a646e26a70a3105dbedfd0fb72845119d

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