Malicious PDF — malware analysis report

Static analysis result for SHA-256 d40270801ae90bfc…

MALICIOUS

PDF

85.6 KB Created: 2021-02-11 13:58:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 981ae677c5851f96ee2e82a9dbbfac59 SHA-1: d96e5cf625382b4a8aefcadd22309abd15f7fc3c SHA-256: d40270801ae90bfc2e57bccc6065fa68569adde39eae82388eade08be3ee2de2
136 Risk Score

Malware Insights

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

The PDF contains a heuristically identified random URL that is likely malicious, and another external URI that is also suspicious. The ML classifier and ClamAV detection strongly indicate maliciousness. The document body, though heavily obfuscated, suggests a lure related to a 'Housing stability plan' to entice users to click the malicious link.

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
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://seumenha.ru/123?utm_term=housing+stability+plan PDF link annotation
    • http://leaninrzpd.site/information_technology_operations_roles_and_responsibilitiespgagz.pdfIn PDF document text
    • http://vigastlens.xyz/67831473512ofzbb.pdfIn PDF document text
    • http://voiprormul.xyz/opaque_beer_brewing_processd20jr.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369315/normal_600018e36579c.pdfIn PDF document text
    • http://geosen.net/warlings_armageddon_hack_version_download2m1km.pdfIn PDF document text
    • http://fallofelin.online/sewubisimozasakefajimifotqxdql.pdfIn PDF document text
    • http://uber-global.com/best_bible_study_guide_online8ql97.pdfIn PDF document text
    • http://podarokinsta24.online/fenixowolirbipwg.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/tejuvonixag/bricks_beads_and_bones_notes.pdfIn PDF document text
    • https://s3.amazonaws.com/piwupevivotixi/83333913343.pdfIn PDF document text
    • https://s3.amazonaws.com/rekorewexidiwo/81511401046.pdfIn PDF document text
    • https://s3.amazonaws.com/jijari/92035073447.pdfIn PDF document text
    • https://s3.amazonaws.com/viregujipowuru/vepuxutoxazuvetekolubop.pdfIn PDF document text
    • https://s3.amazonaws.com/zifozujiwi/autocad_drawing_for_civil.pdfIn PDF document text
    • https://s3.amazonaws.com/migivewuwe/grudge_match_imdb_parents_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/fosalizuzu/enlargement_maths_worksheet_gcse.pdfIn PDF document text
    • https://s3.amazonaws.com/dipafuxe/wire_gauge_thickness_chart.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_off000110bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110BB 5092 bytes
SHA-256: b73af4546a3f46aff029fe069253386350ad887754cb02be39980a3ad661c53c
font_01_sfnt_off00012229.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12229 11564 bytes
SHA-256: f8144005cead8f5301cf6360dc45f217bef682ae9a3aee958cb1a1f78c72316a

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