Malicious PDF — malware analysis report

Static analysis result for SHA-256 621fb684d3c17f35…

MALICIOUS

PDF

68.8 KB Created: 2020-12-26 16:31:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 489701821fd17462e4b2498a9ce58a01 SHA-1: 7fd68b7402103f6905f4bd9abfd9ff875b3db4d4 SHA-256: 621fb684d3c17f35603aa5fff3d68a21f68a910fa51d9ccc019433e3396c7f3e
154 Risk Score

Malware Insights

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

The PDF contains embedded URLs that point to known malicious redirector infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The ML classifier also flagged this PDF with high confidence. The primary malicious URL identified is https://traffmen.ru/aws?utm_term=calendario+escolar+galicia+2019+pdf, which is likely used to deliver a malicious payload or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://traffmen.ru/aws?utm_term=calendario+escolar+galicia+2019+pdf
    • https://cdn.sqhk.co/dagizonu/evIdhh6/hockey_games_neon_air_hockey.pdf
    • https://kufesolujuxubi.weebly.com/uploads/1/3/4/3/134373324/7262586.pdf
    • https://xojisige.weebly.com/uploads/1/3/1/6/131637148/7087518.pdf
    • https://cdn.sqhk.co/zegetaru/2p9ZhbV/best_movies_on_amc_on_demand.pdf
    • https://cdn.sqhk.co/gikunixa/hfmKIii/27196876542.pdf
    • https://vigekajabaka.weebly.com/uploads/1/3/4/7/134708837/tutiwewaguwarib-bibesiwirus-butuduva-pafamo.pdf
    • https://dozumudokasalog.weebly.com/uploads/1/3/4/9/134902229/xatinedafidofe_zufitabo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/5a2f241b-94f7-4e59-9ae0-221c7cc5911c/4719342031.pdf
    • https://uploads.strikinglycdn.com/files/e6c9b848-76cd-48d6-aff0-751cb46a49d3/29055014655.pdf
    • https://s3.amazonaws.com/zuwosil/liserorudegigovafegozoxuw.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bfb6.bin
80d2c8c882421ed5cf4eb2b1dacb152282db3343ddad70b149a57b05d2ccb494
pdf-font-stream PDF embedded font (sfnt) at offset 0xBFB6 5536 bytes
font_01_sfnt_off0000d295.bin
ccb7bf821e4012990d18fa1db76c64f06739339f9c112d858a5a09cbe3177792
pdf-font-stream PDF embedded font (sfnt) at offset 0xD295 11088 bytes
font_02_sfnt_off0000f6d8.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f
pdf-font-stream PDF embedded font (sfnt) at offset 0xF6D8 4324 bytes