Malicious PDF — malware analysis report

Static analysis result for SHA-256 b54bc3a251803de1…

MALICIOUS

PDF

91.6 KB Created: 2021-04-09 15:41:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 44a0801f7de83b6e56e18ded07a5c16d SHA-1: 7725e5b4655808b8ff53d77ac97cdc658cfc8b6f SHA-256: b54bc3a251803de12d42abdcedcdc915cffa82fa9c8f390a8481c17c4a2a0f01
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains an embedded URL pointing to 'baarspo.ru/strik' which is likely used for phishing or to download a secondary payload. The document body, though heavily obfuscated, suggests a lure related to a "ping pong tutorial". No scripts were extracted, but the presence of external URIs and the overall detection indicate a malicious intent to redirect users to a compromised site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://baarspo.ru/strik?utm_term=ping+pong+tutorial PDF link annotation
    • http://garanibukumom.scienceontheweb.net/uniform_circular_motion_questions_and_answers.pdfIn PDF document text
    • http://puzexijabin.mypressonline.com/32744217352.pdfIn PDF document text
    • http://onatural.space/84210876584nkhba.pdfIn PDF document text
    • http://deemonatrafik.xyz/the_fuel_and_the_flame_summarycoiuk.pdfIn PDF document text
    • http://winoraama.fun/foxasozofolonegyao6o.pdfIn PDF document text
    • http://nout-sale.site/22944574815x7us4.pdfIn PDF document text
    • http://stassikorskyi.com/namosebopalebep9toxv.pdfIn PDF document text
    • http://powerhdniy.space/65562704867lgimh.pdfIn PDF document text
    • http://gufutaca5.xyz/48492420672btxin.pdfIn PDF document text
    • http://carinsusa.info/spectrum_math_workbook_grade_8_free92cvz.pdfIn PDF document text
    • http://ozalupa.space/mobile_app_creator_software_free_downloadzd2cj.pdfIn PDF document text
    • http://ro-shop.space/185793748931nw08.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/f81b2e7e-3a09-4814-bfd1-60abfe424766/how_to_reset_financial_calculator_hp_10bii.pdfIn PDF document text
    • http://kenesowozowojaw.myartsonline.com/adverb_english_list.pdfIn PDF document text
    • https://s3.amazonaws.com/fapaga/86682963334.pdfIn PDF document text
    • https://s3.amazonaws.com/kawotexulozax/lasko_5586_digital_ceramic_tower_heater_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/xotomisen/pukepaxogijazexa.pdfIn PDF document text
    • https://s3.amazonaws.com/gorajikunobixi/95945783617.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9660d0a3-c544-446f-9d86-1cee583e5b8d/basic_mathematics_form_three_notes.pdfIn PDF document text
    • https://s3.amazonaws.com/tazopaju/bose_wireless_headphones_user_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/xefejevife/xugowenobulevopoveda.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_off000128b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128B5 4808 bytes
SHA-256: f274f474b78537fc400e9f6992e58bc3b9bd1ab17c524f982ccaefd32794e288
font_01_sfnt_off00013926.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13926 11596 bytes
SHA-256: ddcd2e2bf9457b684747757caa0cd5be4690a1b0fe8e788ee367d1780f87a3b0

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