Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3ff8eee3a83ac9d…

MALICIOUS

PDF

100.1 KB Created: 2021-03-25 06:06:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: dcebebe558abdedeb5b276443c21bbd1 SHA-1: 98a799f028a80bc0da533cf6886d81da0dd28174 SHA-256: f3ff8eee3a83ac9d29665e7c990d0a219f5114d3252f6efe822a1ca8c9b523b2
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URL pointing to a suspicious domain, identified by ClamAV as Pdf.Phishing.Trojan. The ML classifier also flagged this PDF as malicious. The document body, though heavily obfuscated, appears to be related to 'algebra linear equations pdf', suggesting a lure to trick users into visiting the malicious URL.

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://fokemale.ru/award?keyword=algebra+linear+equations+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4458622/normal_6011ce4c2a44d.pdfIn PDF document text
    • http://sevezor.scienceontheweb.net/guzudowivilujisutokow.pdfIn PDF document text
    • http://raxawevamavox.getenjoyment.net/zosogarovigetazanisimusag.pdfIn PDF document text
    • http://akmurzina.com/biblia_jerusalen_para_descargarflsbo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427267/normal_60152b77db667.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4494160/normal_600190c96073e.pdfIn PDF document text
    • http://iclod.tech/94607756046b0hxu.pdfIn PDF document text
    • http://nigavereke.mygamesonline.org/walgreens_30_second_digital_thermometer_battery_size.pdfIn PDF document text
    • http://vipimuxatomefi.medianewsonline.com/9661696734.pdfIn PDF document text
    • http://ekzo-fruit.ru/863770442066jjpg.pdfIn PDF document text
    • http://zapixexarepol.medianewsonline.com/41715727454.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454281/normal_5fced532b9843.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/visagogijulep/21655602426.pdfIn PDF document text
    • https://s3.amazonaws.com/tetofamuxulil/zukibitepugisivazobipoto.pdfIn PDF document text
    • http://zavulelobawabi.onlinewebshop.net/jesowevare.pdfIn PDF document text
    • https://s3.amazonaws.com/tinezedu/33012880613.pdfIn PDF document text
    • http://tonavisuma.onlinewebshop.net/kikakovekutune.pdfIn PDF document text
    • https://s3.amazonaws.com/winumigutam/slouching_towards_bethlehem_essays_fsg_classics.pdfIn PDF document text
    • https://s3.amazonaws.com/xulepiwa/descargar_juego_de_crash_bandicoot_android.pdfIn PDF document text
    • https://s3.amazonaws.com/goveruduzewoxu/amelia_jane_enid_blyton.pdfIn PDF document text
    • https://s3.amazonaws.com/rewepalazamiso/akuntansi_syariah_sri_nurhayati.pdfIn PDF document text
    • https://s3.amazonaws.com/garorowa/43669207509.pdfIn PDF document text
    • https://s3.amazonaws.com/xomudufe/52090500639.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000132f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132F4 5464 bytes
SHA-256: 51883f475fbfa99f42d5c93d6aaff1711b5ed46f012f777fc4c075b24c47498e
font_01_sfnt_off0001458b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1458B 11636 bytes
SHA-256: 272e323db9e43fbdf5315c0ed2546af741b06bc460999e443a31540aaac4d215
font_02_sfnt_off00016d1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16D1B 16312 bytes
SHA-256: 4dc16601eb26abc7134502136ef21155b89bb9f79dd28a4e3e05b1e8661c7350

Open this report in the interactive analyzer, or submit your own file for analysis.