Malicious PDF — malware analysis report

Static analysis result for SHA-256 f03ef11a990ca90e…

MALICIOUS

PDF

68.8 KB Created: 2021-02-26 03:15:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 803fe062793d31b20851d5aef8c63575 SHA-1: c943c591273c942326fd5f9949648d02c64140da SHA-256: f03ef11a990ca90e22788cfef81b75f72ac986191a6dc695a1a82a68c722b986
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to potentially malicious domains, as indicated by the 'PDF_SEO_LINK_FARM' and 'ML_NYX_PDF_MALICIOUS' heuristics. The primary URL, 'https://jottigo.ru/wb?keyword=maximum%20ride%20fanfiction%20max%20gets%20new%20powers', appears to be a lure, and the overall structure suggests a phishing or malware distribution attempt. ClamAV also detected this file as 'Pdf.Phishing.Trojan'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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.
  • 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://jottigo.ru/wb?keyword=maximum%20ride%20fanfiction%20max%20gets%20new%20powers PDF link annotation
    • http://jekenufakewe.mypressonline.com/how_to_reset_honeywell_thermostat_rth2300b1012.pdfIn PDF document text
    • http://gtomishebs.xyz/refraction_of_light_quizbydx6.pdfIn PDF document text
    • https://puwulafu.weebly.com/uploads/1/3/5/3/135329465/455815.pdfIn PDF document text
    • http://jaxagogilexet.sportsontheweb.net/temepulemijisilerexo.pdfIn PDF document text
    • https://bupafenanibud.weebly.com/uploads/1/3/4/0/134042845/lelusivosoda.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wenares.myartsonline.com/how_did_womens_lives_change_in_the_1920s.pdfIn PDF document text
    • https://s3.amazonaws.com/turip/nice_guidelines_colorectal_cancer_staging.pdfIn PDF document text
    • https://s3.amazonaws.com/pasawe/pedegupifopakuzutewidi.pdfIn PDF document text
    • http://rususekobijo.myartsonline.com/nadunijopejozaluwir.pdfIn PDF document text
    • https://s3.amazonaws.com/pigolo/9967996463.pdfIn PDF document text
    • https://s3.amazonaws.com/biwuwukesazef/46528153261.pdfIn PDF document text
    • https://s3.amazonaws.com/pobixedele/outdoor_code_poster.pdfIn PDF document text
    • https://s3.amazonaws.com/miwolezedubujoz/thaiyal_books_free_in_tamil.pdfIn PDF document text
    • https://s3.amazonaws.com/xipavir/railroaded_richard_white.pdfIn PDF document text
    • https://s3.amazonaws.com/farokof/garuxaloxefixatadupagux.pdfIn PDF document text
    • https://s3.amazonaws.com/sinamozagemoger/71300227939.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_off0000d09d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD09D 5608 bytes
SHA-256: 71110a6a063e184afaa09fb70f34c162cb64dd5984f39b0c3b3e054191db040a
font_01_sfnt_off0000e3c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3C7 10060 bytes
SHA-256: 4a157d2a946515be3bbd9a9224bd5db2a88525e1d089c9c40179e3a9790a6216

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