Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f8911115cd36fc7…

MALICIOUS

PDF

73.4 KB Created: 2021-02-23 05:31:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 8523f117d44034d3b5a245b1dad55458 SHA-1: 94b7178b9258d1899e6e514fc4014d907797555d SHA-256: 0f8911115cd36fc7e0974805b42cd7604197c29c9c1b3d68f565f69abc164398
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, which is likely intended to deceive the user into visiting a phishing site. No scripts were extracted, but the presence of an external URI in a malicious PDF strongly suggests a phishing or credential harvesting attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://leonvi.ru/123?utm_term=memorando+ejemplo+llamado+de+atencion+pdf PDF link annotation
    • https://cdn.sqhk.co/difixoruze/Mjgjiw7/36024702543.pdfIn PDF document text
    • https://cdn.sqhk.co/nojedajoze/qggifeV/ivory_soap_and_juicy_fruit_gum_song.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477408/normal_5fc65108b831e.pdfIn PDF document text
    • https://cdn.sqhk.co/xegapanasa/gfdJie8/wordpress_themes_for_authors_free.pdfIn PDF document text
    • https://cdn.sqhk.co/milatepoz/cDogdJc/44652185112.pdfIn PDF document text
    • https://cdn.sqhk.co/motanunika/5J7jaMy/gopiparat.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470223/normal_5ff4bb4339b4f.pdfIn PDF document text
    • https://cdn.sqhk.co/kulobibab/Iiazshd/wizz_air_abu_dhabi_head_office.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472208/normal_5fd379f2469ce.pdfIn PDF document text
    • https://cdn.sqhk.co/lerapuraroke/drxhbak/80405384585.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/wopari/chevel_shepherd_the_voice_performances.pdfIn PDF document text
    • https://s3.amazonaws.com/sasufufa/elementary_autobiography_template.pdfIn PDF document text
    • https://s3.amazonaws.com/pidufozu/voucher_format_in_excel_free.pdfIn PDF document text
    • https://s3.amazonaws.com/jijumupade/volume_of_composite_cuboids_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/ganubifirigevi/presentation_software_free_full_version.pdfIn PDF document text
    • https://s3.amazonaws.com/xapidajovaji/child_bible_stories_online.pdfIn PDF document text
    • https://s3.amazonaws.com/jafujasiwetid/witisunijobesu.pdfIn PDF document text
    • https://s3.amazonaws.com/pulujolatepuv/bokamajuvigifuneviz.pdfIn PDF document text
    • https://s3.amazonaws.com/samopakamefap/75981632216.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_off0000df13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF13 5204 bytes
SHA-256: 357bbd25e28f4b50df0e5dae6059a676bd9fcb3ef0f2893928c825629b495702
font_01_sfnt_off0000f0c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0C2 11748 bytes
SHA-256: 5538ea30d8c6cb320113eecf4faad95acaaa15bbcbe961888ac1bba6ba31bfdf

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