Malicious PDF — malware analysis report

Static analysis result for SHA-256 175b1fa2231e2b91…

MALICIOUS

PDF

69.8 KB Created: 2021-01-31 04:44:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: bad1e5ddbcaa0df5051eeaa7ea9aca73 SHA-1: e0952bacadeaf86ccc0248cabaaebc04227a11f6 SHA-256: 175b1fa2231e2b915942a1b78b1ef97edf7c9d655f44bdaacf3d6dcb98be427a
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous embedded URLs, with one prominent URL pointing to 'maypoin.ru' and another to 'kubudafexajik.rf.gd', suggesting a lure to external malicious content. The document body, though truncated and containing artifacts, includes 'Maryland driver's manual', aligning with the phishing pretext.

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://maypoin.ru/123?utm_term=maryland+driver%2527s+manual PDF link annotation
    • http://riniwovefaraw.22web.org/bepodigemejoboravome.pdfIn PDF document text
    • http://dazixetenulega.22web.org/analistas_de_sistemas_informticos.pdfIn PDF document text
    • http://dutuxagedam.66ghz.com/harness_racing_victoria_stewards_reports.pdfIn PDF document text
    • http://rijuwutosepirol.iblogger.org/22555035331.pdfIn PDF document text
    • http://hookup154.space/amor_eterno_sheet_musicf04f2.pdfIn PDF document text
    • http://vebejisidag.66ghz.com/tuxibifibepamorob.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kubudafexajik.rf.gd/feralodi.pdfIn PDF document text
    • http://zorogeloma.epizy.com/inherit_the_wind_movie_worksheet.pdfIn PDF document text
    • http://dojidusajotat.epizy.com/bratz_logo.pdfIn PDF document text
    • http://duvasupe.epizy.com/57622913335.pdfIn PDF document text
    • http://bikilut.epizy.com/circle_area_questions_and_answers.pdfIn PDF document text
    • http://sidakofonol.epizy.com/76872807972.pdfIn PDF document text
    • http://dikivila.epizy.com/39099218298.pdfIn PDF document text
    • http://refewebol.epizy.com/banox.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_off0000d456.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD456 5172 bytes
SHA-256: 552b428640ec040a6db5059100f4bf853312ffa92ff9929e6a33e697bc2f8e61
font_01_sfnt_off0000e5f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5F3 10748 bytes
SHA-256: 122b8f9a21c8ea6ebf91c7edb768690e9baa4ae165cea919981405a8bc68815c

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