Malicious PDF — malware analysis report

Static analysis result for SHA-256 261176c38167702f…

MALICIOUS

PDF

77.5 KB Created: 2021-03-07 10:31:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 5ac3bc8a4cee78ff1f57e00047669574 SHA-1: 1401c9abee825519c97f0b3c39d6e1978690a9c4 SHA-256: 261176c38167702f60eb8fb77343364b75ff96a8c86dd0b35ce74d604d17909d
104 Risk Score

Malware Insights

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

The file is identified as malicious by a machine learning classifier and ClamAV, specifically as a phishing trojan. The document body, though heavily obfuscated, contains text related to 'amazon customer service' and 'account will be terminated', suggesting a phishing lure. An external URI pointing to 'leonvi.ru' was extracted, likely serving as the malicious destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://leonvi.ru/aws?utm_term=how+to+write+amazon+customer+service PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4420902/normal_6014d8aac7847.pdfIn PDF document text
    • https://bituxomixa.weebly.com/uploads/1/3/4/1/134131270/vetaxutovadixopiza.pdfIn PDF document text
    • http://kaxidabifibag.iblogger.org/avast_for_windows_7_pc.pdfIn PDF document text
    • https://besikutusesa.weebly.com/uploads/1/3/2/6/132681218/getusizugasevuw.pdfIn PDF document text
    • http://fesetinidu.iblogger.org/how_to_write_a_composition_essay.pdfIn PDF document text
    • https://kuvezuwuziteb.weebly.com/uploads/1/3/4/3/134388010/8275227.pdfIn PDF document text
    • http://sulevaxobema.22web.org/ch_10_states_of_matter_virtual_lab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482671/normal_6042829bb1f12.pdfIn PDF document text
    • http://lezapogogaz.iblogger.org/21833189730.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468261/normal_604348506364b.pdfIn PDF document text
    • https://cdn.sqhk.co/rebamomidaw/KI0gey0/70154749413.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411923/normal_5ffe697e4fbe4.pdfIn PDF document text
    • https://cdn.sqhk.co/zoxogatuv/hegVgeg/toca_life_stable_free_download_ios.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489596/normal_60316c91cdd7e.pdfIn PDF document text
    • https://cdn.sqhk.co/gixekoji/ifijhiZ/meteor_shower_lyrics_elizabeth_grace.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/juvetaso/2593165381.pdfIn PDF document text
    • https://s3.amazonaws.com/baxunaf/asmaul_husna_adalah_nama_nama_allah_yg.pdfIn PDF document text
    • http://xakorixomunaniw.epizy.com/45949533806.pdfIn PDF document text
    • https://s3.amazonaws.com/xelimewat/walt_whitman_mall_food_trucks.pdfIn PDF document text
    • http://mawugosujutesag.epizy.com/berenstain_bears_series_books.pdfIn PDF document text
    • https://s3.amazonaws.com/mavixu/color_contrast_ratio_chrome.pdfIn PDF document text
    • https://s3.amazonaws.com/baxunaf/bengali_calendar_free.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_off0000f2f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2F6 5076 bytes
SHA-256: 42870aa65317b68a26db42dd45b7168690d20b1e9c429ec049b421ea96224708
font_01_sfnt_off0001043e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1043E 10732 bytes
SHA-256: a7c211c0e726a43bf7a4349ef3ef55be518a629b0e3354fab985a837a06ab856

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