Malicious PDF — malware analysis report

Static analysis result for SHA-256 1bb061b3db3d9643…

MALICIOUS

PDF

86.6 KB Created: 2021-03-03 20:21:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: d83a7a7ab032e2db27551491fc61ee89 SHA-1: 26b115e6e3ed0b87183409e533468afe20326feb SHA-256: 1bb061b3db3d964355c3ddd2747c5205affb11ad7e0fb7d97c6ebde42551050f
96 Risk Score

Malware Insights

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

The PDF document contains a lure related to job searching, which is a common phishing tactic. It embeds an external URI pointing to 'bologen.ru', likely intended to redirect the user to a malicious site. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan.

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://bologen.ru/123?utm_term=what+are+entry+level+jobs+for+marketing+majors PDF link annotation
    • https://cdn.sqhk.co/govulasem/vVigzja/hungry_shark_attack_simulator_new_hunting_games_2018.pdfIn PDF document text
    • http://zokidinodajives.getenjoyment.net/bozulupo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4527345/normal_5fee7ebba7f3c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451230/normal_5fcf5e3ba8a19.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492536/normal_603366319fcf6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470385/normal_5ff1d9bdb842d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366660/normal_5fce8ee323407.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377125/normal_602a2e096e6b3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384308/normal_60313cd5cb4bc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pigutun.myartsonline.com/how_much_is_a_bale_of_pine_straw_at_lowes.pdfIn PDF document text
    • https://s3.amazonaws.com/sesafefanulokam/ribbon_in_the_sky_lyrics.pdfIn PDF document text
    • https://s3.amazonaws.com/kewuxejikiwe/analysis_and_design_of_algorithms_tutorialspoint.pdfIn PDF document text
    • http://sajomapujozokux.onlinewebshop.net/65707528674.pdfIn PDF document text
    • https://s3.amazonaws.com/zebarufuridorur/how_to_automate_android_app_testing.pdfIn PDF document text
    • https://s3.amazonaws.com/fekaduvopigab/best_android_mod_app_store.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_off00011479.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11479 5636 bytes
SHA-256: 7daaefb440a188e16e5a4c7219790db5a3555a838f8c4eb71aff923b5d9c80aa
font_01_sfnt_off00012797.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12797 11008 bytes
SHA-256: 039031c93bfbc1333160afa0fdabee840fb2ffa6b719d7db2f9eb996ac46b37a