Malicious PDF — malware analysis report

Static analysis result for SHA-256 3695383ecf6bd2e5…

MALICIOUS

PDF

93.0 KB Created: 2021-04-08 07:34:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 335796e931b2d0a2a88f5604754c24ac SHA-1: f9b9ae979b1306473cf5a602e8ed94a5e0792ac1 SHA-256: 3695383ecf6bd2e571936abaf0d02e17878b715cea6a8a02db8eb95f292206b7
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or trojan payload. It contains a high number of embedded links, many pointing to disposable domains, suggesting a link farm designed to redirect users to malicious sites. The presence of 'utm_term' in one of the URLs further suggests a tracking or redirection mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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/strik?utm_term=2001+polaris+sportsman+500+awd+wiring+diagram PDF link annotation
    • http://wildboost.club/fundamental_forces_worksheet_answerswp1i5.pdfIn PDF document text
    • http://driveformclanemilwaukee.com/jifexojuwekidasuzelv03tc.pdfIn PDF document text
    • https://cdn.sqhk.co/zogugumo/cTmEiiR/64495570052.pdfIn PDF document text
    • http://chambreapp.xyz/56393290581zc83v.pdfIn PDF document text
    • http://minuette.me/92860134257htpvk.pdfIn PDF document text
    • https://cdn.sqhk.co/mevojazix/3Nrfljg/17773176155.pdfIn PDF document text
    • http://poradoit1.site/jaxisefodebevkqtd0.pdfIn PDF document text
    • https://cdn.sqhk.co/firijanab/jeFE7ic/zodugexas.pdfIn PDF document text
    • https://cdn.sqhk.co/dukoredod/egifPif/masotero.pdfIn PDF document text
    • https://cdn.sqhk.co/vokalater/eiifihz/37505123654.pdfIn PDF document text
    • http://nikecortez.net/kelvin_celsius_fahrenheit_conversion_worksheet61llc.pdfIn PDF document text
    • http://spacexfoundation.net/6304176550952qmz.pdfIn PDF document text
    • http://alexsaf.ru/72309764897yjksz.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/joterige/wiperekuzejofefuv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1dd6d9d8-e468-4c7c-a275-6f96a773f2b5/number_the_stars_questions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8b052554-731a-44cf-a7cf-6f0c6007ee38/bagelodikegad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d2c63cd-dfda-4029-84ad-272cab342d32/pilazoxifuginasivinevujo.pdfIn PDF document text
    • https://s3.amazonaws.com/mogipegi/gender_equality_survey_report.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3cd2d7d3-a985-4305-993d-1050559f0fe9/gajudugos.pdfIn PDF document text
    • https://s3.amazonaws.com/pekatikisuruki/how_to_fix_a_dishwasher_that_wont_start.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f41f27c-f55b-4d64-8c8a-7e488f56b8c0/what_are_the_4_types_of_intermolecular_forces.pdfIn PDF document text
    • https://s3.amazonaws.com/woxojuxafopuv/customer_onboarding_email_template.pdfIn PDF document text
    • https://s3.amazonaws.com/tarajix/biostar_handbook.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_off00012c48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C48 5728 bytes
SHA-256: 696a4adfea31cee64e83eb880c72d8d2e745dc336e3637e22c9884ed83be39d0
font_01_sfnt_off00013fcd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13FCD 11196 bytes
SHA-256: 0e99dd713e69d99920d9f337fb65d9496916ba0571481a4fc2facd53fa526060

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