Malicious PDF — malware analysis report

Static analysis result for SHA-256 878ee0cd7cbcd888…

MALICIOUS

PDF

77.2 KB Created: 2021-04-25 22:46:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 5e1f87ed46fef098d9e2cdc5def6aaf3 SHA-1: db104b285c0ac75a8cb75cd112eb0f02bd4aab12 SHA-256: 878ee0cd7cbcd888bef1d6868c299bf08833e7d7acc484818a836293a9343fe8
134 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://leonvi.ru/strik?utm_term=english+grammar+pdf+free+download+in+gujarati PDF link annotation
    • https://cdn.sqhk.co/jozazixefuf/ipjihnN/75334946308.pdfIn PDF document text
    • https://cdn.sqhk.co/foseziwate/0jd6bKJ/nojotu.pdfIn PDF document text
    • http://fuwiduwoxobol.mygamesonline.org/13392646385.pdfIn PDF document text
    • http://xobilosusi.sportsontheweb.net/6854036721.pdfIn PDF document text
    • https://cdn.sqhk.co/nepusoliweda/j3iJTPX/active_record_validations_guide.pdfIn PDF document text
    • http://fejekadiwoxobiz.getenjoyment.net/hip_replacement_rehab_exercises.pdfIn PDF document text
    • https://somotudodij.weebly.com/uploads/1/3/4/6/134699902/japam_wifokekawaj.pdfIn PDF document text
    • http://loneresel.mygamesonline.org/ethical_hacker_salary_in_dubai.pdfIn PDF document text
    • https://cdn.sqhk.co/kelarega/akhb7jf/production_line_factory_definition.pdfIn PDF document text
    • https://cdn.sqhk.co/jasorevujoxu/hidhjVe/aisi_430.pdfIn PDF document text
    • https://zedabobosarafon.weebly.com/uploads/1/3/0/8/130813357/fopuzofesa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gigitepusiligo.epizy.com/netflix_pro_apk_latest_version.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/06ffd71e-5926-4410-8ade-c4f7c560ebcb/tusuzutapetep.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/962ec2e7-b569-45e1-9af6-51255e1e16f4/competition_demystified_book.pdfIn PDF document text
    • http://fasalowesi.epizy.com/m-audio_keystation_49es_black_with_ableton_lite.pdfIn PDF document text
    • http://tirodubixuvix.epizy.com/bounty_hunter_metal_detector_manual_tracker_iv.pdfIn PDF document text
    • http://bezopiwuzalobit.rf.gd/algebra_cube_formula.pdfIn PDF document text
    • http://lojibovel.myartsonline.com/betibuluwutuvabojumiw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dcc7735c-398c-43b8-805f-182cfeb5bb77/japisu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/94a92053-e13e-4533-89f6-3d546a586f03/wagner_power_painter_max_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5bb7894b-d5b5-478c-aef6-1d2dd23f20c0/11996229386.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_off0000ed61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED61 5580 bytes
SHA-256: 8a82e78c84a7e14b13778fa4c645c072957a6881ffabc4a91456cf06aa288428
font_01_sfnt_off00010050.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10050 10904 bytes
SHA-256: 7727c48ae910f133035368414a4f860c0a1134250d3bc39cd32c3d8299ad1a34

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