Malicious PDF — malware analysis report

Static analysis result for SHA-256 278bb8d5bab6881b…

MALICIOUS

PDF

74.7 KB Created: 2021-03-08 23:44:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 47a84c419aa8b65cabfbe97837a073a6 SHA-1: af7025d51983a49c4b6fd389b5669e792a1c11c2 SHA-256: 278bb8d5bab6881b53b017f7fb56bba81f755a74a2c8069e53c1977e3dcb81aa
96 Risk Score

Malware Insights

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

The file is identified as a malicious PDF by ML classifiers and ClamAV. It contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a phishing site. The document body, though heavily obfuscated, contains metadata related to the wkhtmltopdf application, suggesting it may have been generated programmatically. No scripts were extracted, but the presence of external URIs indicates a phishing or redirection 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://jumiwimov.ru/strik?utm_term=chicco+keyfit+30+infant+insert+replacement+canada PDF link annotation
    • http://foxiduwanati.mygamesonline.org/anne_bradstreet_to_my_dear_and_loving_husband_analysis.pdfIn PDF document text
    • http://gagogepatajebe.medianewsonline.com/sylvia_plath_quotes_about_writing.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470402/normal_5fed72145c23e.pdfIn PDF document text
    • http://manamuposa.getenjoyment.net/the_long_haul_rodrick_funny_moments.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479691/normal_5fc686ac01c9a.pdfIn PDF document text
    • http://xxlmature.site/dawosaxirugupud9956.pdfIn PDF document text
    • http://devajusogav.22web.org/6665636429.pdfIn PDF document text
    • http://wesabelilunu.22web.org/under_which_of_the_following_sets_of_circumstances_might_an_auditor_disclaim_an_opinion.pdfIn PDF document text
    • http://miiliioner.xyz/43432031139lvh0p.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370054/normal_6005be11a3f9c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369153/normal_5ff202c609510.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454277/normal_5ffb93a04eaf6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kofaxafogi.myartsonline.com/nebafewezufizepesawoma.pdfIn PDF document text
    • http://savefativiluz.epizy.com/kitegukefinoliwex.pdfIn PDF document text
    • http://namakanexir.atwebpages.com/is_nano3_an_ionic_or_covalent_compound.pdfIn PDF document text
    • https://s3.amazonaws.com/zesixefe/vaxuwuzuxixazizizozoxur.pdfIn PDF document text
    • https://s3.amazonaws.com/dapekufoxiraku/android_latest_phones_for_sale.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_off0000e796.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE796 5772 bytes
SHA-256: c99d3b85355a1a387b585ed4f1a3fbf3fcbf60e1ec3a90e3cd608f13f00bd774
font_01_sfnt_off0000fb19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB19 10016 bytes
SHA-256: d7155f54eb9b3f0b0e85f44ef4e7eba82ea0cb0fd626ad64d88e322c7befd7b7

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