Malicious PDF — malware analysis report

Static analysis result for SHA-256 7994c57a9617c81e…

MALICIOUS

PDF

87.4 KB Created: 2021-03-05 05:58:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 014b4b821d3acbb25aac1ac8336809fc SHA-1: 463b3e691d6a033aad003c73157fd738e01fca6b SHA-256: 7994c57a9617c81e10e7ac63e6fb6aef81c6c79805e5e1e73d3977889166d07e
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to disposable domains and link farms, suggesting a phishing or malware distribution campaign. The presence of external URIs and the link farm heuristic indicate an attempt to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://baarspo.ru/wix?keyword=bns+irontech+forge+guide PDF link annotation
    • https://cdn.sqhk.co/minofavazu/ijggdkV/naripijurusudofawoxa.pdfIn PDF document text
    • http://nubolutlion.xyz/who_dies_in_avengers_endgame_comicpo8t8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389604/normal_603362ae942a2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367635/normal_5ff197e777797.pdfIn PDF document text
    • https://cdn.sqhk.co/xibidodoko/ih7zVB7/merge_object_blender_2._8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382966/normal_5fcf6ca900bda.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419654/normal_60001ddfb3769.pdfIn PDF document text
    • http://astrology-personal.online/plantilla_libro_diario75c1f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446633/normal_6021d32968fbd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369654/normal_6008b20169535.pdfIn PDF document text
    • http://kersita.space/63819040521p7osl.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392667/normal_5fefaaa91c494.pdfIn PDF document text
    • http://copyrightproblem.com/zidotedag7k7e.pdfIn PDF document text
    • http://gbarb.me/border_patrol_agent_killed_fast_and_furiousm385h.pdfIn PDF document text
    • https://cdn.sqhk.co/zebenane/4ickTji/11793677780.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://zozezofi.rf.gd/bringing_them_home_report_essay.pdfIn PDF document text
    • https://s3.amazonaws.com/kevava/zavaketevubusig.pdfIn PDF document text
    • http://lewupidofiji.epizy.com/chakram_telugu_movie_video_songs.pdfIn PDF document text
    • http://lexaxixamu.rf.gd/ukulele_songs_for_beginners_youtube.pdfIn PDF document text
    • https://s3.amazonaws.com/pidufozu/22531088036.pdfIn PDF document text
    • http://jiwimid.epizy.com/53646502951.pdfIn PDF document text
    • http://dumixagaw.rf.gd/what_kind_of_fish_does_long_john_silvers_use.pdfIn PDF document text
    • https://s3.amazonaws.com/xiwevitox/to_the_abandoned_sacred_beasts.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010e1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E1F 4972 bytes
SHA-256: ca2eb12fe96f92ecb347bfe37f871c9b65597f8710f6c61a5c622d957eb28ce2
font_01_sfnt_off00011f01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F01 10232 bytes
SHA-256: 65be03f3dfd6c1d96aaf9f853644c69e9a8d1071e3c536c4abf78f299ea1e504
font_02_sfnt_off00014221.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14221 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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