Malicious PDF — malware analysis report

Static analysis result for SHA-256 12c5b280df9cd3c3…

MALICIOUS

PDF

76.3 KB Created: 2021-03-10 11:56:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: b4a1c362de32945a6213d14a4c2475c2 SHA-1: 86c498fc16066f67b4607978d0f7df4826b2bfc7 SHA-256: 12c5b280df9cd3c309b6c5234068a5aac2434182364a306e5d5749c517939d79
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 flagged as a phishing trojan. It contains an embedded URI pointing to 'https://zajinet.ru/aws?utm_term=spark+definitive+guide+book', which is likely the primary lure. The document body, though heavily obfuscated, suggests a deceptive lure related to a 'Spark definitive guide book'. No scripts were extracted, but the PDF structure and heuristics indicate malicious intent.

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://zajinet.ru/aws?utm_term=spark+definitive+guide+book PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4450635/normal_5fdf494a45b19.pdfIn PDF document text
    • http://sawotawigusewon.22web.org/32192748066.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380695/normal_600e0c8382f07.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424647/normal_5fc713e138ea1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xuwanozofugis.epizy.com/76237456720.pdfIn PDF document text
    • https://s3.amazonaws.com/bejokazemur/camera_api_tutorial_android.pdfIn PDF document text
    • https://828c6a01-da61-4814-986a-f72e64f4f334.filesusr.com/ugd/cdfdba_3d13458841ba4f3cae573d6fe4265044.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/padadutiseni/bhojpuri_song_audio_mein.pdfIn PDF document text
    • https://de7eff9d-5c50-4122-bb99-ee112abf7a8f.filesusr.com/ugd/db8f21_34a1b435b1ef4df392df26fb8d80bfcc.pdf?index=trueIn PDF document text
    • https://e05653fc-386e-4c8b-889d-738aee72c63e.filesusr.com/ugd/62421a_58a6f11e694b4398b4b8c97a53d13279.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/f82c08ec-0add-4a84-914f-15d33f1fc591/how_to_create_a_story_structure_bbc_bitesize.pdfIn PDF document text
    • http://manuzuwefegovev.epizy.com/95739129126.pdfIn PDF document text
    • https://s3.amazonaws.com/dafumuxitupav/pictograph_and_bar_graph_worksheets_3rd_grade.pdfIn PDF document text
    • https://s3.amazonaws.com/pukiza/86300275932.pdfIn PDF document text
    • http://duguteterexu.epizy.com/46635853121.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bee2a5c9-564a-4321-a248-15685a5f9de5/18124981802.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d1ffdcb8-01db-4bab-af1a-45451925af66/tijipil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b2096039-129a-42c6-a037-f4a8c9c786e1/voduxelubujoje.pdfIn PDF document text
    • http://kipirigup.rf.gd/top_romance_books_2020_uk.pdfIn PDF document text
    • http://sotatelovutegep.epizy.com/47878230218.pdfIn PDF document text
    • http://tupibamogowoful.rf.gd/el_diario_de_greg_1_un_chico_en_apuros.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1fa00d7-0e3e-49aa-b9b9-aee1f05f4c69/xibuxa.pdfIn PDF document text
    • https://s3.amazonaws.com/firudegix/kegexilidifibew.pdfIn PDF document text
    • http://pemisikozawefa.epizy.com/friday_hourly_weather_report.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_off0000edf5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDF5 5364 bytes
SHA-256: 6e3b7ac25497d7cc7d4fd7a26207b927ba35c356e2f3a3e2367e6c6f6c760bff
font_01_sfnt_off0001004c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1004C 10524 bytes
SHA-256: 436c9857be1a75fcee4effdd6686e7e9473426d3068a47042b7530de9813c8fa

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