Malicious PDF — malware analysis report

Static analysis result for SHA-256 f75df9e3eccfe4f1…

MALICIOUS

PDF

73.5 KB Created: 2020-12-28 16:43:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: af37963687c91422c50aaeda1a8e4721 SHA-1: d9f0301c26a738c492eed30d34e1005ff2cf4877 SHA-256: f75df9e3eccfe4f10e2db6c1d2814ff6987c6144714f71412e738c4178fcb464
214 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with one identified as a malicious redirector. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' and 'ML_NYX_PDF_MALICIOUS' strongly indicate malicious intent. The document body, though heavily obfuscated, contains text suggesting a lure related to a 'Sanatorium movie trailer', which is likely a pretext to drive users to malicious sites. The presence of numerous external PDF links also suggests a link farm or redirection strategy.

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
  • 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.
  • 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.
  • 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://ggtraff.ru/strik?utm_term=sanatorium+movie+trailer In PDF document text
    • https://gusumadanu.weebly.com/uploads/1/3/2/6/132695601/5282713.pdfIn PDF document text
    • https://ladasewesadil.weebly.com/uploads/1/3/4/6/134665294/kijenu-tijejozo-sogizanul.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483837/normal_5fd795464081b.pdfIn PDF document text
    • https://rajexomogalifi.weebly.com/uploads/1/3/4/8/134891851/fe3aabaa3dfc0.pdfIn PDF document text
    • https://lotozuxefad.weebly.com/uploads/1/3/4/3/134316708/2529241.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/dinigugaxej/nijopimizefasat.pdfIn PDF document text
    • https://s3.amazonaws.com/fekaduvopigab/28525946296.pdfIn PDF document text
    • https://s3.amazonaws.com/lusabifef/lilodawinadun.pdfIn PDF document text
    • https://s3.amazonaws.com/ditiruz/wodemumuruja.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/48bbd036-1a2b-4f3f-a2d3-bd751a5730a6/neethane_neethane_mp3_song_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ebd5a434-701a-4d8f-b41d-c753f970b271/49090589060.pdfIn PDF document text
    • https://s3.amazonaws.com/sefabe/75003607042.pdfIn PDF document text
    • https://s3.amazonaws.com/zifozujiwi/functions_of_language_in_society.pdfIn PDF document text
    • https://s3.amazonaws.com/dudigonifu/cbre_central_london_office_market_report.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_off0000e095.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE095 4816 bytes
SHA-256: 17727f5ef5d52317657f088001bb66b3690a8b5a56b059e22ad6b6f3616b3030
font_01_sfnt_off0000f0e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0E4 11448 bytes
SHA-256: 3468703cea91256717bcb077a292cd781619882a05368173305d99e62c88718b

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