Malicious PDF — malware analysis report

Static analysis result for SHA-256 805c33a88b13fecd…

MALICIOUS

PDF

74.3 KB Created: 2021-05-29 05:34:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 347e02efd1007e9450d4e41af65e7fda SHA-1: 3f9e0934ca7e12c89cb566d8b8285875f424a3ed SHA-256: 805c33a88b13fecd9dd18dc0686802a3d72cdca980ca088d418577870912f711
136 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File T1059.007 JavaScript

The PDF document contains a lure related to using a keygen on macOS, which is a common pretext for phishing or malware delivery. It also contains an embedded URI pointing to a suspicious domain, 'jottigo.ru', which is likely used to host or redirect to a malicious payload. The ML classifier and ClamAV detection strongly indicate malicious intent, likely involving the download and execution of a remote support tool.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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
  • Remote-support tool lure high SE_REMOTE_SUPPORT_LURE
    Document instructs the user to install, open, or connect with a remote-support tool such as AnyDesk, TeamViewer, Quick Assist, or ScreenConnect — high-risk in an unsolicited document
  • 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=how+to+use+keygen+on+mac PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4381962/normal_60108e0cab8ec.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417213/normal_5ff3a4a54d36d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426688/normal_60199ea7719e8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475197/normal_6006e163dc8d2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481168/normal_5fda3d1419574.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417414/normal_6051634e43820.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500674/normal_605a3fb103c2e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374013/normal_5fec307a88944.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456143/normal_601f304bab58a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385010/normal_5feb946d0f8aa.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/aa1591dd-9017-4338-bb86-781bd3645142/answers_to_4th_grade_math_worksheets.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/77b910c0-1193-4a1f-b87b-74cd0fb0ce7e/tadimiximisopalajexuzi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c9e06c6e-164b-420b-9345-e044e161951a/the_warren_buffett_way_audiobook_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8dc81003-d60a-40c8-a683-ab64a70ae620/20205975942.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad933249-2214-400f-8420-96150ec1def3/oracle_sql_combine_date_and_time.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ae25bb8-a1dc-4a8a-b149-65eef1e55f2f/zunibubofudux.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/98ce3c91-10fc-4736-938a-c845b4f2ef09/knowledge_matters_paying_your_taxes_sim_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb01539c-d490-4134-9f8f-0614903b7e3c/jaxatibofuxozebuzekub.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0e29a094-560f-41e3-a6bc-c994c7f3222f/86301533190.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/909480cc-2329-4a71-957d-08e9e13116f9/how_to_regain_spell_slots_avrae.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e1ab72e-18cd-45a6-b0ac-901fea223a02/filipino_alphabet_chart_with_pictures.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c6f9c1a-f936-419a-8223-a00210037942/what_can_i_wear_with_navy_pants.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf480eb4-963a-43e2-bb8f-fe8ca5c09e8f/75956903342.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_off0000e7c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7C2 5212 bytes
SHA-256: 1fea0902d7f2bf5628a09c325d3b9f52f5f0c875b62acca9312e00cff335a573
font_01_sfnt_off0000f98a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF98A 10244 bytes
SHA-256: 65c0da82224b117e77fa2757ce3aa9492e3b3f42de909044792876c29f9fa8e7

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