Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf7a509da84cc3ab…

MALICIOUS

PDF

75.0 KB Created: 2021-04-10 06:03:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 8bdfbf0e697e255861f94d5cd38ff7ab SHA-1: 8f2df4421962aef9436d4fac32ce2dbe40216cdc SHA-256: bf7a509da84cc3ab67c1f22367dc3e19b1c62d93e46ebe51bcc90ca61fd0791f
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains an embedded URL pointing to 'jottigo.ru', which is likely used to deliver a secondary payload or redirect the user to a phishing site. The document body, though partially corrupted, suggests a lure related to educational content.

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://jottigo.ru/strik?utm_term=future+continuous+tense+worksheet+with+answers PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4445534/normal_602daec896ddd.pdfIn PDF document text
    • https://cdn.sqhk.co/gikunixa/idXxgew/magisterium_book_5_free.pdfIn PDF document text
    • https://cdn.sqhk.co/dolitife/aOcGKeQ/97476429157.pdfIn PDF document text
    • https://cdn.sqhk.co/nofevemumidu/jyjajcH/nodebiwejev.pdfIn PDF document text
    • https://cdn.sqhk.co/pelopuxi/nij45LQ/318800564.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495526/normal_604db348ee18b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/wajufifenoxuj/persepolis_online_castellano.pdfIn PDF document text
    • https://s3.amazonaws.com/votubukaxogilix/libaxito.pdfIn PDF document text
    • https://s3.amazonaws.com/tesasubawalozan/vcds_11._11._3_crack.pdfIn PDF document text
    • https://s3.amazonaws.com/xidazeze/chartered_financial_analyst_course_in_kenya.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b05960e7-e532-491d-acef-4661b847c50c/where_to_put_tens_pads_for_sciatica.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f97a3e5-dcb3-47a7-848b-bd2713113fad/solosevolusosuv.pdfIn PDF document text
    • https://s3.amazonaws.com/vapelurowar/68570061078.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/700f96f1-4cb8-4761-9e23-e3392504475d/levigod.pdfIn PDF document text
    • https://s3.amazonaws.com/dopugaxelelema/how_to_do_a_legal_case_study.pdfIn PDF document text
    • https://s3.amazonaws.com/lolaritemukole/where_is_samsung_fridge_water_filter.pdfIn PDF document text
    • https://s3.amazonaws.com/bezegoluzose/biblia_de_jerusalen_online_portugues.pdfIn PDF document text
    • https://s3.amazonaws.com/patotale/43218784113.pdfIn PDF document text
    • https://s3.amazonaws.com/dobikasukavu/31704318723.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d3bf364-6892-49e0-b18e-5bcf0a9d2668/yoga_mudras.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_off0000e72b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE72B 4964 bytes
SHA-256: 799d308e91564bd1c80618eaa3ea0d756423044a8106e3b58190243e1aa127ee
font_01_sfnt_off0000f81f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF81F 10728 bytes
SHA-256: 6189d9ca6cf0c78e6bd8f19d243a51553231de260c1da6ded8c3661d16a8a774

Open this report in the interactive analyzer, or submit your own file for analysis.