Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8af7ededd74cea7…

MALICIOUS

PDF

99.7 KB Created: 2021-03-14 05:54:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: c0c7f75382cd88291cc8af5a068bfe1e SHA-1: 3f92effe438beafe804aff5d3e66b54eeb3cadd9 SHA-256: a8af7ededd74cea787c5056f663d183be2ee0587ef53d8ae2d4e506fb94206b8
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains a URL that is disguised as a manual, likely to trick the user into visiting a malicious site. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and embedded URI suggest a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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/wix?keyword=opnavinst+3120.32d+standard+organization+and+regulations+manual PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4486975/normal_5fe3a1cf5bcd1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390330/normal_604895979a54d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388613/normal_603cf313d4c02.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371495/normal_6013253f28b28.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/nopomewegobij/events_occurring_after_balance_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/vipinib/what_is_the_purpose_of_convict_labor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc13dd45-ab01-4490-81cb-245dc9273ebc/83519884620.pdfIn PDF document text
    • https://1c684d3d-b1aa-4d58-8f8e-408f9cf37fac.filesusr.com/ugd/64d889_3c33d3599f694ede811982f9fe936c51.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lezopobigeza/bioelectronics_medicine.pdfIn PDF document text
    • https://7835c217-6b95-46a1-915a-76cdebae3fe0.filesusr.com/ugd/debfb4_24593dab16ae4ae98c440f8efa8d4a22.pdf?index=trueIn PDF document text
    • https://0bdb67af-4c57-4a6e-9706-714cc80719f5.filesusr.com/ugd/fc840b_e4069a9f71284e0ab17b27195f0c6548.pdf?index=trueIn PDF document text
    • https://2c8134a4-d865-4da1-8961-c755d7242105.filesusr.com/ugd/6dcf04_231af882c6dc4287a958feecab92b354.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a265e70-b982-4ca4-99a5-e41948e332ee/how_to_set_acurite_wireless_thermometer_00592w.pdfIn PDF document text
    • https://s3.amazonaws.com/minabiwa/chiari_malformation_surgery_length.pdfIn PDF document text
    • https://6f29901e-f5c9-4775-879c-97b2de5c8d5b.filesusr.com/ugd/0bf195_8be700c6ea594d498158cb02e5f16ca5.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/059fcd14-be1b-4821-bc3c-c2530859b7ea/average_speed_in_calculus.pdfIn PDF document text
    • http://nekaxikafixof.epizy.com/taking_sides_book_history.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2480d938-666f-43fd-92bc-f630cfc8353b/huskee_24_in._two-stage_snow_blower_review.pdfIn PDF document text
    • http://giverez.epizy.com/nikon_prostaff_target_efr_3-9x40_ao_review.pdfIn PDF document text
    • http://sizokipizap.rf.gd/diy_king_pallet_platform_bed.pdfIn PDF document text
    • http://pesivosemero.epizy.com/cbse_syllabus_for_class_10_science.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_off00014875.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14875 5936 bytes
SHA-256: 50650b5cd0b92f9411515650724bf185f056dc4245cc72adba3996e8cd2a5d07
font_01_sfnt_off00015ca9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15CA9 10456 bytes
SHA-256: 6fb5c83e75564af5961b93bbade9247437abe64e384827e2fd78d6363234805e

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