Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7276b73a6fc57fa…

MALICIOUS

PDF

74.6 KB Created: 2021-03-27 14:02:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8500de9873bea549f3433936d846e2b4 SHA-1: 53beabd8194fb9aaff968e0a8e08c2478b5ed000 SHA-256: d7276b73a6fc57fab068304153599f386ed5bdc1415507b531c4969cce7941c7
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of an external URI pointing to 'jumiwimov.ru' suggests a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the PDF structure and heuristics indicate it's designed to trick users into clicking a link, likely leading to a phishing page or a second-stage payload download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://jumiwimov.ru/strik?utm_term=official+citizen+h145+setting+instruction
    • https://cdn-cms.f-static.net/uploads/4393348/normal_6016f7a4cbe02.pdf
    • https://static.s123-cdn-static.com/uploads/4454052/normal_60068ce6757c4.pdf
    • https://fupefasupemeze.weebly.com/uploads/1/3/4/3/134315788/3553001.pdf
    • http://sesosorav.iblogger.org/90485663213.pdf
    • https://cdn-cms.f-static.net/uploads/4490377/normal_5fd68cf394036.pdf
    • https://lujipened.weebly.com/uploads/1/3/2/7/132740552/lozixipidoladep.pdf
    • https://cdn-cms.f-static.net/uploads/4393508/normal_6052bb77d6602.pdf
    • https://cdn-cms.f-static.net/uploads/4459062/normal_601736d7271c6.pdf
    • http://nudazizefa.22web.org/54110637259.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://mepejolowu.rf.gd/video_editor_software_windows_7.pdf
    • https://11627308-8c8f-4f08-99ed-0ad85160907d.filesusr.com/ugd/682d1c_cc9d3d5640574a03a7974cd04e0cc65b.pdf?index=true
    • http://tasukifuputuf.epizy.com/argos_egyptian_cotton_bath_sheets.pdf
    • https://s3.amazonaws.com/bokelur/68029870979.pdf
    • http://vuruwabudakase.epizy.com/invited_crossword_answer.pdf
    • https://b064d0e4-88d6-4b7e-8087-8ebf790fcba6.filesusr.com/ugd/ca32a8_02a768abbc8247518f9771c70c9080a1.pdf?index=true
    • http://fezedosez.rf.gd/faxabalemiruvox.pdf
    • https://33c7e2ec-32fc-4676-a642-9d95a4379e01.filesusr.com/ugd/622218_b9158db779a34d9a93342f61451e5a52.pdf?index=true
    • https://s3.amazonaws.com/fakuguvil/cataract_surgery_guidelines_2017.pdf
    • https://2559d30b-64cd-4b4d-aaad-e76a675dde99.filesusr.com/ugd/f5a024_97d4a5535dd24235aa1c1ad4a0390e6c.pdf?index=true
    • https://s3.amazonaws.com/xovajukoxin/4136467110.pdf
    • https://s3.amazonaws.com/tamovagag/general_rules_of_dimensioning.pdf
    • http://besigaku.epizy.com/37042583209.pdf
    • https://s3.amazonaws.com/remeranexe/free_australian_will_kit_template.pdf
    • http://gebavuzulom.epizy.com/administrao_de_pequenas_empresas_nfase_na_gerncia_empresarial.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d00e.bin
9a8dcbcf2dd436b728e2b3266a656086e7b9c858c11539d86a423ee4a0097d71		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD00E 3940 bytes
font_01_sfnt_off0000de27.bin
cf0822afe943576c087b318220f545f0f4657d0a66b949c35f450a759311b482		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDE27 5484 bytes
font_02_sfnt_off0000f0dd.bin
d1b279cf8082e27c9f76ce120a3008f105c4c4666c2204b16d51d3e4dacddec6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF0DD 12860 bytes

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