Malicious PDF — malware analysis report

Static analysis result for SHA-256 efab42caaf0a67fd…

MALICIOUS

PDF

82.9 KB Created: 2021-03-15 02:44:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 5b8715cd9905681752530704edfc2863 SHA-1: de4ff59bc10ea6e9566954ef46e7d89234afd069 SHA-256: efab42caaf0a67fd456736036a875f9d1757b1e7392f7c71b4ce5ec7da2ccb11
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://jottigo.ru/123?utm_term=rescind+an+offer+letter+template PDF link annotation
    • http://dakekunagefasak.sportsontheweb.net/36299510324.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374207/normal_5fe3d5642c3ad.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375716/normal_5ff06c1ff0e3e.pdfIn PDF document text
    • http://tufofol.medianewsonline.com/81094038839.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489033/normal_6042d2258bba9.pdfIn PDF document text
    • http://posadukik.getenjoyment.net/certificado_medico.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475208/normal_5ff7c73d54e6f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4394068/normal_5ff987d3b10c7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388050/normal_5ff5459284581.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://muzubosumewuxem.epizy.com/33702616041.pdfIn PDF document text
    • https://s3.amazonaws.com/rurosaveruk/ipad_mini_5_case_with_hand_strap.pdfIn PDF document text
    • https://s3.amazonaws.com/voxipanovigepiv/android_studio_ubuntu.pdfIn PDF document text
    • https://s3.amazonaws.com/jivagajamav/chowgule_group_annual_report.pdfIn PDF document text
    • https://s3.amazonaws.com/telasebisu/certainteed_siding_warranty.pdfIn PDF document text
    • https://s3.amazonaws.com/napoledunadigo/international_accounting_definition.pdfIn PDF document text
    • https://s3.amazonaws.com/vunizi/61031288181.pdfIn PDF document text
    • https://s3.amazonaws.com/zebarufuridorur/kathi_tamil_movie_ringtone.pdfIn PDF document text
    • http://xilereguf.rf.gd/biosynthesis_of_indole_alkaloids.pdfIn PDF document text
    • https://s3.amazonaws.com/bibejovixapis/30984564584.pdfIn PDF document text
    • http://nuwadolonopip.onlinewebshop.net/433055925.pdfIn PDF document text
    • https://s3.amazonaws.com/jusagi/wuverekumewoposowolisuron.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_off0000fb02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB02 5096 bytes
SHA-256: 63bdf5da53734cb551bad4cecf7a70a0bb346f2c564af62ad0e4305d18ac99cf
font_01_sfnt_off00010c39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C39 10548 bytes
SHA-256: 8f5ecb3dac645625f8fc8d7abd9ca95281d09af844095ad226018b5f0db81a6e
font_02_sfnt_off00013063.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13063 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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