Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9d566f7258da941…

MALICIOUS

PDF

76.7 KB Created: 2021-06-02 21:25:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 26159f578b0375be889a1e246216657f SHA-1: 7d690d8c4a5435d6aaac0c9e835a701a4e85e5a0 SHA-256: d9d566f7258da9416d56339d667765c0538ec77715c1db3ca85c581dcd2a6807
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL that directs users to a site offering information about becoming an Uber driver, likely a lure to disguise the malicious intent. No scripts were extracted, but the presence of an external URI and the ML/AV detections strongly indicate a phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://irlanc.ru/pbw?utm_term=how+to+be+uber+driver+canada
    • https://cdn-cms.f-static.net/uploads/4372087/normal_6052c3fd85f07.pdf
    • https://static.s123-cdn-static-d.com/uploads/4485818/normal_60b747b6a629a.pdf
    • https://static.s123-cdn-static.com/uploads/4471275/normal_6007dc1c43aec.pdf
    • https://cdn-cms.f-static.net/uploads/4372080/normal_6067a28bdec3d.pdf
    • https://cdn-cms.f-static.net/uploads/4444366/normal_6023c8320748a.pdf
    • https://static.s123-cdn-static.com/uploads/4388065/normal_5ff7d5b732355.pdf
    • https://static.s123-cdn-static.com/uploads/4498992/normal_5ff59c601dd4a.pdf
    • https://cdn-cms.f-static.net/uploads/4462379/normal_604b37cbea61d.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://gepefupugalu.pbworks.com/f/51647101902.pdf
    • https://uploads.strikinglycdn.com/files/3a78a5eb-8de4-4e61-9b6f-87d042e6d208/what_is_the_high_court_of_heaven.pdf
    • http://papoxuva.pbworks.com/w/file/fetch/144423429/nigitazijabasom.pdf
    • https://uploads.strikinglycdn.com/files/fd8ac863-dd86-421e-9580-84e0306c7a7a/upgrade_aqualink_rs_to_iaqualink.pdf
    • https://uploads.strikinglycdn.com/files/294b7b6f-a45b-4dde-b9b4-e7efd1ff91c9/edipo_rey_personajes_principales_y_secundarios.pdf
    • https://uploads.strikinglycdn.com/files/0a9f8e57-43eb-402b-abf0-ffe7e1e1d644/49080439517.pdf
    • https://uploads.strikinglycdn.com/files/5b1971b6-3c69-47fc-8ae9-90be5d06a8e8/hp_desktop_beep_codes.pdf
    • https://uploads.strikinglycdn.com/files/8e1b40a5-851f-4414-b382-0a13e328cf4e/reading_street_grade_5_grammar_and_writing_practice_workbook.pdf
    • http://siwuromo.pbworks.com/w/file/fetch/144424617/78534742448.pdf
    • https://uploads.strikinglycdn.com/files/2576193d-bc86-4098-9e74-19d803def610/what_is_the_conflict_in_the_censors.pdf
    • https://uploads.strikinglycdn.com/files/dbb2f14e-3992-4abf-85e0-06affc3107e2/naza_m_lite_wont_connect_to_pc.pdf
    • https://uploads.strikinglycdn.com/files/28aa93ef-a812-461e-a7e2-bac771cb8983/tissot_t-touch_expert_solar_price.pdf
    • https://uploads.strikinglycdn.com/files/4fac9c14-ceae-49f3-9459-9a0a63fb0c86/zonix.pdf
    • https://uploads.strikinglycdn.com/files/3f095b61-eac3-4082-a0c1-ffcb36a68766/73281701207.pdf
    • https://uploads.strikinglycdn.com/files/bc4a8ca1-d3c0-4ad8-9f9a-9835a71b802e/6748325611.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e1db.bin
1d9c20cff30165c76b8d48ecb0d210c9d04b7429abb22848337f3511cea34eca
pdf-font-stream PDF embedded font (sfnt) at offset 0xE1DB 4860 bytes
font_01_sfnt_off0000f27c.bin
74d8cfa92cd06a6e94c57fe4e35d128f787a0b5743cd9e60e6f1f8ff01be4893
pdf-font-stream PDF embedded font (sfnt) at offset 0xF27C 10764 bytes
font_02_sfnt_off00011750.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f
pdf-font-stream PDF embedded font (sfnt) at offset 0x11750 4324 bytes