Malicious PDF — malware analysis report

Static analysis result for SHA-256 fec75dc9bfcf5aa6…

MALICIOUS

PDF

75.3 KB Created: 2021-02-12 13:08:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 7236842fee48d01a8e951d3c9ae9a788 SHA-1: 28c679fdaae9343b9dbac1a6360ca2b9f859ce53 SHA-256: fec75dc9bfcf5aa6f1f47910e8a6194f919e365a0de77d4e24810b786fceeb92
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier indicating maliciousness. It contains numerous embedded URLs, with one prominent URL pointing to 'https://leonvi.ru/123?utm_term=point+of+concurrency+example', suggesting a phishing or redirection attempt. The presence of a link farm on disposable hosting further supports malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://leonvi.ru/123?utm_term=point+of+concurrency+example PDF link annotation
    • https://fedofiri.weebly.com/uploads/1/3/2/6/132681193/rotebalutot-lipebo-vamuropomi-kidaroxuno.pdfIn PDF document text
    • http://pevojatinolotej.22web.org/deparovefepodov.pdfIn PDF document text
    • https://jawuwokobot.weebly.com/uploads/1/3/1/3/131381435/db43888cde3ce.pdfIn PDF document text
    • https://venevivoxeda.weebly.com/uploads/1/3/1/8/131857756/49aa71598dd77.pdfIn PDF document text
    • http://bigops.fun/pdf_to_word_documents_onlinemqzpw.pdfIn PDF document text
    • http://linogozajasupe.22web.org/23102298391.pdfIn PDF document text
    • http://yourlivehelp.com/geophysical_research_letters_templatef8mx3.pdfIn PDF document text
    • http://leftoutclub.com/61095660716tiww9.pdfIn PDF document text
    • https://kazuvamelu.weebly.com/uploads/1/3/0/7/130738637/8582790be8ba3d.pdfIn PDF document text
    • http://sweetmeet.online/navtec_hydraulic_backstay_adjuster_manual1kgjz.pdfIn PDF document text
    • http://zixonolugajona.iblogger.org/talidemi.pdfIn PDF document text
    • http://haustova.com/181497489584w4vu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://divifafapinuk.rf.gd/vezis.pdfIn PDF document text
    • https://s3.amazonaws.com/gajabedafot/74686508701.pdfIn PDF document text
    • https://s3.amazonaws.com/gaxuremewuger/719396506.pdfIn PDF document text
    • https://s3.amazonaws.com/feborobegibew/bleacher_report_wwe_aew_grades.pdfIn PDF document text
    • https://s3.amazonaws.com/jadudusujuje/logo_intro_video_templates.pdfIn PDF document text
    • http://vedewigawis.epizy.com/temusewuvusikupo.pdfIn PDF document text
    • http://meresig.epizy.com/fobumuzegufalaketamut.pdfIn PDF document text
    • http://zavujosabojid.rf.gd/wifuxuligovu.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d5f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5F0 5152 bytes
SHA-256: e860f215251d19554f594ca8d97012ad68ab674bf8e43f76e1c5fa60851c4edf
font_01_sfnt_off0000e774.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE774 10184 bytes
SHA-256: de21c283ee2d01a3d2bb14c9c69766a7c55fcf8c28d331f8cab8a28e5e2708ae
font_02_sfnt_off00010a6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A6B 16076 bytes
SHA-256: b1f97e92d77070b91358efe20fa54a522675a4baa6c31971de41670b8d223c62

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