Malicious PDF — malware analysis report

Static analysis result for SHA-256 a56dfabb1ff29d1f…

MALICIOUS

PDF

70.4 KB Created: 2021-02-24 14:11:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 36341b81ed4676a71b3e08d2a7d30922 SHA-1: 674b819b747af7a5c68321b5c1df44f6ef6b6b05 SHA-256: a56dfabb1ff29d1fda2d2a6510abd8127314da1eabc9ea06c68f25d078d9a66b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The sample is a PDF file flagged by multiple heuristics and a machine learning classifier as malicious, specifically for credential phishing. It impersonates Microsoft and contains an action link that redirects through a redirector to a malicious PDF. The embedded URL also points to a potentially malicious domain, suggesting a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://koxizekeb.weebly.com/uploads/1/3/4/7/134770308/koloroxixakorugapob.pdf.
  • 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/wix?keyword=premier+student+loan+center+phone+number PDF link annotation
    • http://slimerecipe.org/793829457187v06q.pdfIn PDF document text
    • https://koxizekeb.weebly.com/uploads/1/3/4/7/134770308/koloroxixakorugapob.pdfIn PDF document text
    • https://tavadubamik.weebly.com/uploads/1/3/4/4/134473349/603714.pdfIn PDF document text
    • https://vowebaxuzifov.weebly.com/uploads/1/3/0/7/130738870/6943402.pdfIn PDF document text
    • http://boviriso.22web.org/yamla_pagla_deewana_movie_song.pdfIn PDF document text
    • http://alifan.store/la_cancion_de_annier2e0q.pdfIn PDF document text
    • http://detonic-ro.website/pesidowaralulexedupu3gxl.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://renaxodemebi.rf.gd/powerpoint_kinetic_typography_template.pdfIn PDF document text
    • http://jubuzixabes.rf.gd/fuduwebekor.pdfIn PDF document text
    • http://renunuxuxalebav.epizy.com/30700282233.pdfIn PDF document text
    • https://s3.amazonaws.com/bifadiwuwileji/bingo_live_chat_video.pdfIn PDF document text
    • http://xudadadof.epizy.com/7388464695.pdfIn PDF document text
    • http://sewoxoxitif.rf.gd/dell_laptop_black_friday_deals_walmart.pdfIn PDF document text
    • https://s3.amazonaws.com/bipovoromoj/pofisawotodoje.pdfIn PDF document text
    • https://s3.amazonaws.com/salosibejodod/ginnie_mae_mbs_investor_reporting_manual.pdfIn PDF document text
    • http://fazafof.rf.gd/analytical_reasoning_mcqs_with_answers.pdfIn PDF document text
    • http://mivapizin.epizy.com/skills_needs_analysis_template.pdfIn PDF document text
    • https://s3.amazonaws.com/farezelof/12549983262.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_off0000d761.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD761 5456 bytes
SHA-256: f0f1870d0701aa3fecfb2ab7312ef03b3dd2601191ee5ecb39b7d521c1b333f8
font_01_sfnt_off0000e9b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9B9 10120 bytes
SHA-256: ce9b7dbd30f5761049a2a2fb2ebec6bd53891a09f6a04d3f200a357dc372d7ed

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