Malicious PDF — malware analysis report

Static analysis result for SHA-256 024420934808e476…

MALICIOUS

PDF

91.8 KB Created: 2021-04-02 21:40:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: d88a001b189025377cc774c482f779cb SHA-1: bdaf6898d623ea46633e278da0ac86598a290c82 SHA-256: 024420934808e476b0a3e5546663ea29df7dc78dea213fbc863979bbd3fc87bc
156 Risk Score

Malware Insights

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

This PDF was flagged by multiple heuristics and a machine learning classifier as malicious, specifically as a phishing or trojan. The PDF contains a large number of external links, many of which point to other PDFs, suggesting a link farm or a method to distribute further malicious content. The primary URL, https://kuzutuzo.ru/award?keyword=cours+pour+apprendre+l+allemand+pdf, is likely part of this distribution or phishing attempt.

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://kuzutuzo.ru/award?keyword=cours+pour+apprendre+l+allemand+pdf PDF link annotation
    • https://cdn.sqhk.co/jifedibodo/jzihhdf/83137900566.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449004/normal_600d342aa061a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463794/normal_601ad455f1453.pdfIn PDF document text
    • https://cdn.sqhk.co/nokodexuxof/0YXvgga/48966840942.pdfIn PDF document text
    • https://cdn.sqhk.co/kosifodalab/qziaaic/big_bang_theory_theme_song_acoustic_chords.pdfIn PDF document text
    • https://cdn.sqhk.co/fagaluwozez/fhafrGE/pudixavewolad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368245/normal_5fd66df71bd38.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366343/normal_60637d835edf5.pdfIn PDF document text
    • https://lipamonevarila.weebly.com/uploads/1/3/1/4/131453989/ragaledibogi_jofazil_sakiga.pdfIn PDF document text
    • https://muragifenujokuf.weebly.com/uploads/1/3/1/1/131164382/jaforanizexovok-kekodalagorat.pdfIn PDF document text
    • https://cdn.sqhk.co/kepilujofeje/T5Pjggd/57034419314.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369660/normal_5fc97b38d34da.pdfIn PDF document text
    • https://cdn.sqhk.co/feguzuvubut/fP8PP9w/vugowoledejiwuxajaposovi.pdfIn PDF document text
    • https://cdn.sqhk.co/kesavaki/1ibygeU/pspad_mobile_ps4_dualshock_gamepad_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/xudadidi/icjejhC/titofavodazew.pdfIn PDF document text
    • https://cdn.sqhk.co/fixikumeboga/d2geha0/prop_hunt_game_mode_fortnite_code.pdfIn PDF document text
    • https://zovejesuvenej.weebly.com/uploads/1/3/1/4/131438366/5894241.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486356/normal_5ff4e32800b49.pdfIn PDF document text
    • https://www.allemandfacile.comIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/xovajukoxin/outputstream_to_bitmap_android.pdfIn PDF document text
    • https://s3.amazonaws.com/zamuriza/software_installation_guide_template.pdfIn PDF document text
    • https://s3.amazonaws.com/jeromopelurab/dengue_ns1_test_report.pdfIn PDF document text
    • https://s3.amazonaws.com/rixevozajixezos/soundcloud_songs_android.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_off00012464.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12464 5092 bytes
SHA-256: e094b81a9fe017dcf15a6451ec1c74b0180708eef823678503c0adadc0fac1a0
font_01_sfnt_off0001359a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1359A 14016 bytes
SHA-256: 51b1034ea73ab1fb40d10c0af97668028753a41438925366d2859e073d1076a9

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