Malicious PDF — malware analysis report

Static analysis result for SHA-256 a54213fa4055c14f…

MALICIOUS

PDF

79.4 KB Created: 2021-04-02 17:17:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d29c320d80126198cc3dadddcfdb0378 SHA-1: 736a20c13fd7da9836cb2a52299d1f149a031159 SHA-256: a54213fa4055c14ffb75bfef107d58e452bd1c957d0e3342eb1c87b4ffcc883f
96 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains embedded URLs, with one prominent URL pointing to 'nipisod.ru', suggesting it's used to redirect users to a potentially harmful site. The document body, though heavily obfuscated, contains metadata suggesting it's a PDF generated by wkhtmltopdf, which can be used to create malicious documents.

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://nipisod.ru/123?utm_term=iccm+care+cqc+report
    • https://cdn.sqhk.co/vawapisoxe/Tiaifhh/how_to_update_software_on_macbook_air_2011.pdf
    • https://cdn-cms.f-static.net/uploads/4454822/normal_602e2f10654db.pdf
    • https://cdn.sqhk.co/birenejar/hgfp7gc/ignou_mcom_solved_assignment_2018-_19_free.pdf
    • https://static.s123-cdn-static.com/uploads/4472788/normal_5fee21d2c89fd.pdf
    • https://cdn-cms.f-static.net/uploads/4486548/normal_602ba7c8757d3.pdf
    • https://zuberexuwaxif.weebly.com/uploads/1/3/4/5/134501439/e96a990a9a.pdf
    • https://zegilaritapedu.weebly.com/uploads/1/3/1/4/131438092/vasawazalunukusepiza.pdf
    • https://cdn.sqhk.co/xutujipux/haOJCgd/brain_out_level_27_how_to_solve.pdf
    • https://cdn-cms.f-static.net/uploads/4367303/normal_6019ff6269eb8.pdf
    • https://cdn-cms.f-static.net/uploads/4369654/normal_5fd320e23f81e.pdf
    • https://cdn.sqhk.co/risubibasero/ifiezJ6/powerpoint_office_floor_plan_template.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/09b6b4ad-b477-4576-bca2-96c696c088b5/lodge_cast_iron_recipes_for_chicken_pot_pie.pdf
    • https://s3.amazonaws.com/zidosozawok/akala_ko_nung_una_lyrics_free.pdf
    • https://uploads.strikinglycdn.com/files/5da7e473-a223-44be-847d-19bfea8fbdcf/what_does_the_rattlesnake_on_the_gadsden_flag_represent.pdf
    • https://uploads.strikinglycdn.com/files/2e5a3073-7d3e-46db-9593-709ea474f3c5/speed_queen_dryer_programming_manual.pdf
    • https://uploads.strikinglycdn.com/files/5f0ca335-8ac2-4ffb-b994-b16c56ae10ee/juvipagil.pdf
    • https://uploads.strikinglycdn.com/files/0bc40029-f5d1-427d-a642-a165ef6901e6/short_film_review_examples_for_students.pdf
    • https://s3.amazonaws.com/xisefowu/60461218683.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f903.bin
5c5c47bb6c3fd754f57891cd758560bbfe9645a9a582ec8d7fe4787d5c8b2153
pdf-font-stream PDF embedded font (sfnt) at offset 0xF903 4932 bytes
font_01_sfnt_off000109b8.bin
2e0c17c65d402fbce0d73cced0bb83361cd85a76d309d801c99eb53fac7a9854
pdf-font-stream PDF embedded font (sfnt) at offset 0x109B8 11548 bytes