Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e571bf76bd6e6af…

MALICIOUS

PDF

72.9 KB Created: 2021-01-19 11:59:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 1a696fa8e1414f0767ba4aa739bcdf65 SHA-1: 8b68e0681401e861d77eb1c4ca936e86a2dba9ff SHA-256: 9e571bf76bd6e6af60d75656dab1ea8ba82ce4f3a6bf78a51d5dc039a9046dc6
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • 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://traffine.ru/123?utm_term=visys+rca+phone+user+manual PDF link annotation
    • http://buliwomof.22web.org/ishikawa_diagram_template_powerpoint.pdfIn PDF document text
    • https://site-1166680.mozfiles.com/files/1166680/82569014471.pdfIn PDF document text
    • https://site-1254240.mozfiles.com/files/1254240/46723489667.pdfIn PDF document text
    • https://site-1194448.mozfiles.com/files/1194448/the_psychology_of_innovation_answer_key.pdfIn PDF document text
    • https://site-1166710.mozfiles.com/files/1166710/tadolixapox.pdfIn PDF document text
    • https://site-1175083.mozfiles.com/files/1175083/86411470541.pdfIn PDF document text
    • http://sexugaweguko.iblogger.org/letter_of_recommendation_for_law_school_template.pdfIn PDF document text
    • http://suzaxikuzexaw.66ghz.com/nilagowe.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tisuvelepep.rf.gd/company_profile_ai_template_free.pdfIn PDF document text
    • http://rufofexejojar.epizy.com/1133217310.pdfIn PDF document text
    • http://nazifaba.rf.gd/wefomekowerididinipaki.pdfIn PDF document text
    • http://litopuputorer.rf.gd/xudini.pdfIn PDF document text
    • http://topadut.epizy.com/jogabivuzite.pdfIn PDF document text
    • https://s3.amazonaws.com/benuka/cours_sur_l_astronomie.pdfIn PDF document text
    • http://gozudivigel.epizy.com/frozen_fever_full_movie_online.pdfIn PDF document text
    • http://lozepis.epizy.com/12200179739.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_off0000e001.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE001 5240 bytes
SHA-256: dca3ce6816fd709dfbba137352031cd7245f1ca36c96e98a3e6c36c5d4aafd4f
font_01_sfnt_off0000f1b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1B6 10904 bytes
SHA-256: f10d79f6b960cda45afb27008c68817cb5bdac6d2273156f06f0d8e451ce1908

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