Malicious PDF — malware analysis report

Static analysis result for SHA-256 47ea7744604d1008…

MALICIOUS

PDF

74.4 KB Created: 2021-03-27 22:27:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: db4c8de6a71a310f4a83eb0128a899ff SHA-1: 8bb902e3f2a2afcc06c552e3c69a107ac8dd53e4 SHA-256: 47ea7744604d100873ea1171da80e7e2e08a3d8f856095b8742cfd539e9dd277
96 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, with a high risk score. It contains an embedded URI pointing to 'https://nipisod.ru/123?utm_term=ahri+guide+9.+20', which is likely used to deliver a secondary payload or redirect the user to a phishing site. The document body, though heavily obfuscated, suggests a lure related to a 'guide'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://nipisod.ru/123?utm_term=ahri+guide+9.+20
    • https://cdn-cms.f-static.net/uploads/4469640/normal_605ef432cf99e.pdf
    • http://zumodaronomana.iblogger.org/tizarasejukulanukivinot.pdf
    • https://cdn-cms.f-static.net/uploads/4465252/normal_604422011fae4.pdf
    • http://bopugafuwu.scienceontheweb.net/segmentation_definition.pdf
    • https://static.s123-cdn-static.com/uploads/4497368/normal_5fdfc5cc35194.pdf
    • https://static.s123-cdn-static.com/uploads/4480895/normal_5fcdfcb1bbbdc.pdf
    • http://migunovaj.iblogger.org/71802514211.pdf
    • https://cdn-cms.f-static.net/uploads/4474457/normal_600fc0f711510.pdf
    • https://cdn-cms.f-static.net/uploads/4446275/normal_6034508144b8c.pdf
    • https://cdn-cms.f-static.net/uploads/4411702/normal_601b454e0194a.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://nojovawu.epizy.com/cgp_a_level_biology_aqa.pdf
    • http://xomapagovujux.atwebpages.com/1st_grade_printable_worksheet.pdf
    • http://dikavara.epizy.com/difference_between_compiler_interpreter_and_assembler_in_tabular_form.pdf
    • http://duloduxu.epizy.com/veteguzoduginulolavo.pdf
    • https://d9226533-59f4-4737-ae77-cfa9cdee5378.filesusr.com/ugd/d7c203_e720db41f99243159b0c5b43b5827cd4.pdf?index=true
    • http://ledufowi.myartsonline.com/antepartum_fetal_monitoring.pdf
    • https://510adc33-753b-44c0-977e-8d34da8fcdd4.filesusr.com/ugd/5f4192_5dc8867bda3a42bb95ac1886c8068fab.pdf?index=true
    • https://8c56b32b-3398-45d6-9c0b-b55146621f16.filesusr.com/ugd/6924eb_81d186e284fc46698d98ee68d6a656c9.pdf?index=true
    • http://pekiluji.atwebpages.com/kakeju.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e5b4.bin
bf5622c378dd217583a2048199cd027a5e51adabee0b0f7cf753fcdc413c1d6e
pdf-font-stream PDF embedded font (sfnt) at offset 0xE5B4 5120 bytes
font_01_sfnt_off0000f72b.bin
b7a3404d4e84874fa30689015891bf2d4fa86e1758bb7283caedc71160142c1a
pdf-font-stream PDF embedded font (sfnt) at offset 0xF72B 11008 bytes