Malicious PDF — malware analysis report

Static analysis result for SHA-256 f03de41eea900dfa…

MALICIOUS

PDF

92.5 KB Created: 2021-05-19 17:14:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 5ec9aa68bc82b6e873d084e7beed837f SHA-1: ba62fe1494486ffba88f0f0c5c1bbb55126023c4 SHA-256: f03de41eea900dfab0a32dcb34c94e414c3d5d3cfb033dfa08de93a79b0daafa
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. The document body contains text related to unit conversion, which is a common lure. An external URI pointing to 'jottigo.ru' was extracted, which is highly suspicious and likely leads to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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/strik?utm_term=convert+52+mg+to+cg PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4394061/normal_602e1a16bab03.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484623/normal_5fff0bfcea73d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413467/normal_602ddbc66c438.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479688/normal_6009b55e2b22a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472213/normal_6029b52bd08ab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470221/normal_5fd2a918dd6ff.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
    • https://s3.amazonaws.com/tuletivotarupu/82111499668.pdfIn PDF document text
    • https://s3.amazonaws.com/nonabafat/29092701249.pdfIn PDF document text
    • https://s3.amazonaws.com/nunakixuma/45447726510.pdfIn PDF document text
    • https://s3.amazonaws.com/fajixe/19408823001.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f08392a4-bcde-49cd-920c-3edfaad94f5b/mukapuxudopuwiv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ebfdcfe2-f8bd-4487-ae70-d743332f1726/the_imitation_game_movie_download_in_hindi.pdfIn PDF document text
    • https://s3.amazonaws.com/vipinib/2018_jamb_government_questions_and_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e384b1b-b1ce-43de-a18b-ac473b3e8a6e/experience_and_education_john_dewey_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ae6ff195-7513-4b69-8607-5e8d3afba3eb/81102786693.pdfIn PDF document text
    • https://s3.amazonaws.com/silubebebefuju/gawevesiretivufexexiful.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d249505-377d-491d-b789-6135a44ac697/83631526728.pdfIn PDF document text
    • https://s3.amazonaws.com/jedaxopopuko/69990768903.pdfIn PDF document text
    • https://s3.amazonaws.com/tojabixefova/format_factory_samsung_10._1.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a82f94d5-b553-4a1e-b40d-010b806839c5/how_to_register_mcgraw_hill_connect.pdfIn PDF document text
    • https://s3.amazonaws.com/susonanezaj/lingvo_english_russian_dictionary_free.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001074e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1074E 4780 bytes
SHA-256: 5e159a7d4d96976f331f45edf9c934408cc30df7d44e3cbf410258b9b61c70e1
font_01_sfnt_off00011783.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11783 11588 bytes
SHA-256: 816fa57893edb16c81fda12db2bff1b1bbb537070a67c6840a51950ece32d0c1
font_02_sfnt_off00013f43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F43 16260 bytes
SHA-256: 61f6a27a0b888a8a50dd7a51d918dc0915a90c9ec51c3a673a9f8299ffb9d616
font_03_sfnt_off000154d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x154D2 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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