Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd483a3a5eca15c6…

MALICIOUS

PDF

80.5 KB Created: 2021-02-12 10:45:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 44bbb67dc676ab787ccee667e0675804 SHA-1: a21cd825fb95a0f6cc955a85c3975aefddd6ea9f SHA-256: cd483a3a5eca15c6ae0fe019499267b814b5ed01aa17dbdcbe54a410859132e1
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The document impersonates a cloud file-sharing service, a common lure for phishing or malware distribution. It contains numerous external links, including one to 'maypoin.ru', suggesting it's part of a link farm designed to redirect users to malicious content or exploit kits.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Cloud document impersonation lure medium SE_CLOUD_DOC_LURE
    Document impersonates a cloud file-sharing service such as SharePoint, OneDrive, Google Drive, Dropbox, Box, or Microsoft 365 and asks the user to open, verify, or access a shared document
  • 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://maypoin.ru/wix?keyword=the+godfather+part+1+google+drive PDF link annotation
    • http://mists.space/rodomunakrkzeg.pdfIn PDF document text
    • https://cdn.sqhk.co/vekuperik/dpxqhb4/20514062967.pdfIn PDF document text
    • https://cdn.sqhk.co/moromasi/jgGibib/60031861113.pdfIn PDF document text
    • https://fexalikinuzumow.weebly.com/uploads/1/3/5/3/135324316/vivuberaliz_sugaw_galur_biguj.pdfIn PDF document text
    • https://cdn.sqhk.co/vamunidibu/MUhcpUL/21571279367.pdfIn PDF document text
    • https://cdn.sqhk.co/lukavago/jfribhh/talking_tom_candy_run_mod_apk_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/muwazubivotu/cKjgiOe/85408152781.pdfIn PDF document text
    • http://alex-chekalev.com/functional_programming_in_java_pierre-_yves_saumontqku6t.pdfIn PDF document text
    • https://musazowoxagaw.weebly.com/uploads/1/3/4/3/134323980/61e32b61f.pdfIn PDF document text
    • https://mozawexi.weebly.com/uploads/1/3/1/8/131856146/polabajuros.pdfIn PDF document text
    • https://cdn.sqhk.co/fobonelaga/hhEOxZF/diwimopadovosisezurub.pdfIn PDF document text
    • https://cdn.sqhk.co/sewadokoka/lIEyiih/46233331545.pdfIn PDF document text
    • https://cdn.sqhk.co/rifokinimito/hzaijdH/regal_cinema_movies_medina.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/gumegulaxi/95343719898.pdfIn PDF document text
    • https://s3.amazonaws.com/tapelu/49394800986.pdfIn PDF document text
    • https://s3.amazonaws.com/xozeb/let_it_snow_sign_template.pdfIn PDF document text
    • https://s3.amazonaws.com/tedowafomaru/briggs_and_stratton_snowblower_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/bipepezuwed/swot_template.pdfIn PDF document text
    • https://s3.amazonaws.com/kujapomib/jogixilemupaxa.pdfIn PDF document text
    • https://s3.amazonaws.com/filidabut/51779899551.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_off0000ff1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF1A 5188 bytes
SHA-256: ed386c806bcf8e4a7207eea05a688bcc127c1f9c048e10aa2397b189331e6eae
font_01_sfnt_off000110cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110CB 10368 bytes
SHA-256: 5b9a938cac74424a94cc24c9c80304a0f053c08a0e83998050b684d85c42cf39

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