Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b249761649ac3e5…

MALICIOUS

PDF

76.1 KB Created: 2021-03-14 20:32:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 0403b4db4613b86775c7bc541eca1ce2 SHA-1: adfca7af5f09af45560e4ae354454347ed745dfb SHA-256: 0b249761649ac3e50f2a2df1da85e9daf301718e410d4df43206004ecbf7280a
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, indicating a high likelihood of malicious intent. It contains numerous external URIs, with one prominent URL suggesting a lure related to a 'mayflower compact worksheet pdf answer key'. The presence of embedded URLs and the nature of the heuristics (link farm on disposable hosting) strongly suggest this document is designed to redirect users to potentially harmful websites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://druttle.ru/wix?keyword=mayflower+compact+worksheet+pdf+answer+key PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4421350/normal_601a641cd0626.pdfIn PDF document text
    • http://tuvivukaroj.mygamesonline.org/20069157708.pdfIn PDF document text
    • https://gadudomarun.weebly.com/uploads/1/3/4/7/134705140/1b196e9.pdfIn PDF document text
    • https://votarozoxanobo.weebly.com/uploads/1/3/4/3/134315144/kigapifeja.pdfIn PDF document text
    • https://pigiburoletu.weebly.com/uploads/1/3/2/6/132695467/miwewamepas-vijira-zobiviwiwekusew.pdfIn PDF document text
    • http://famafivas.iblogger.org/zutebebarodakevadazo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478688/normal_5fd9abaa55eca.pdfIn PDF document text
    • http://mibemuxagegija.mywebcommunity.org/kolazigerulukebox.pdfIn PDF document text
    • https://kezarixanutoge.weebly.com/uploads/1/3/4/3/134372428/1957749.pdfIn PDF document text
    • http://tebogekememesij.mygamesonline.org/17525360875.pdfIn PDF document text
    • https://wokonupojelofa.weebly.com/uploads/1/3/5/3/135351156/xoduzezuninajex-derutus-mewekujirove-jaxijizo.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/zolerazowubow/kosegazujobafe.pdfIn PDF document text
    • http://borovob.epizy.com/gitovedamosali.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/caa0670e-53ad-496c-be00-d013984806d6/nativity_play_script.pdfIn PDF document text
    • http://jiwodiw.myartsonline.com/whats_the_difference_between_the_white_princess_and_the_white_queen.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bc3af91d-7c24-4f0f-9bcb-ff8137c22161/76156737648.pdfIn PDF document text
    • http://jadabizufugiba.rf.gd/fun_riddles_and_brain_teasers_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/tibanepoxilibud/hemangioma_hepatico_2018.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d045aa6-eec1-41af-b67a-09ffadcb93ff/digital_logic_design_notes_aktu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7092cadb-3205-4125-887f-0b1ad22897a9/38743622949.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/be7a5f66-b07a-4501-8891-07fb7d8afe88/mhw_arena_quest_8_guide.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_off0000ead0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAD0 5656 bytes
SHA-256: c71a4104a393acf341e00e2bfacc2811f38f5f8cc1dc1f3577b6a044030a194d
font_01_sfnt_off0000fe0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE0C 10668 bytes
SHA-256: 5f2cbeb12e107c397cc6d2721882e63eb13c5ad2cfc8042456ad240306951438