Malicious PDF — malware analysis report

Static analysis result for SHA-256 6bddfb1223f418a1…

MALICIOUS

PDF

77.0 KB Created: 2021-03-05 19:37:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: fcf6dd295328b362440910b230bf295a SHA-1: 20e183d9c544935d9d3c2fbf2d651320a714ba74 SHA-256: 6bddfb1223f418a15173ce36092060cc977f0f11a624b5b49f1dc37986519460
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded URLs, with one specifically identified as a link farm on disposable hosting, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were directly extracted, the PDF structure and embedded URIs are indicative of a malicious document, likely used as a lure via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://jumiwimov.ru/aws?utm_term=is+there+a+sequel+to+sarah+plain+and+tall PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4386087/normal_5fda758060fe9.pdfIn PDF document text
    • http://mosuxuvemuzuwex.mywebcommunity.org/misaxatanizaxenunabi.pdfIn PDF document text
    • https://cdn.sqhk.co/zidodovare/jmggqgb/piano_midi_app_ipad.pdfIn PDF document text
    • http://instapodarok365.site/takodujabijoxofoxogi4rk6l.pdfIn PDF document text
    • http://pochta-24.cc/15485261041t5ytf.pdfIn PDF document text
    • https://cdn.sqhk.co/feguzuvubut/d2jbMO0/bowmasters_download_for_windows_7.pdfIn PDF document text
    • https://cdn.sqhk.co/semejegofip/ghhXlif/lakisuradokevomunumudetu.pdfIn PDF document text
    • http://xixofafil.medianewsonline.com/fazelegovogop.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486346/normal_5fc81b13e4fc3.pdfIn PDF document text
    • http://allostar.buzz/98282468712xpa8t.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445570/normal_60146839e4fbe.pdfIn PDF document text
    • http://soluzixod.66ghz.com/chucky_horror_movie.pdfIn PDF document text
    • http://blankid.ru/877061657229z6fk.pdfIn PDF document text
    • http://evilcheats.fun/farezibegewulade8nfai.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465688/normal_5fe4027f89d45.pdfIn PDF document text
    • https://cdn.sqhk.co/sabumijobude/aEZ3pib/battery_operated_garland_with_clear_lights.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/nagev/properties_of_nanomaterials.pdfIn PDF document text
    • http://ziradisam.rf.gd/31233859429.pdfIn PDF document text
    • http://zapidijerazavot.epizy.com/95651339890.pdfIn PDF document text
    • http://nopawalaxuwaw.onlinewebshop.net/lajokizaripapixigajamuvom.pdfIn PDF document text
    • https://s3.amazonaws.com/neviwove/oracle_database_12c_admin_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/fedojigudaj/softonic_android_data_recovery.pdfIn PDF document text
    • https://s3.amazonaws.com/wazagidonux/define_platform_as_a_service.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_off0000f070.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF070 5112 bytes
SHA-256: 3dff37ac71118811e332038e0c6c0276b3a44bd75d1da23e06c1a6d7a867ec7c
font_01_sfnt_off000101c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101C3 10712 bytes
SHA-256: 812f80dadd8bcceb8ecf54d0b56b5064e6614f1d8b196a54f87be81291cf6b74

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