Malicious PDF — malware analysis report

Static analysis result for SHA-256 52859f7336225dcd…

MALICIOUS

PDF

89.9 KB Created: 2021-03-31 02:19:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 01a780f8d321187721a02189158a3784 SHA-1: 27282e14255c0c05329e99efdafe8aabc4c936c1 SHA-256: 52859f7336225dcdae77c2428bc5ecd6b975fee64fc0c9084251260e70bf4ce8
186 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including brand-impersonation credential phishing (Netflix) and ML classification. It contains numerous external URIs, with a prominent one redirecting through a Weebly domain to a likely phishing page. The presence of embedded URLs and the overall structure suggest it's designed to trick users into visiting malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://kibutudevitage.weebly.com/uploads/1/3/4/4/134499349/ed8a76b7e7.pdf.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://jacksth.ru/strik?utm_term=how+to+open+samsung+tv+service+mode PDF link annotation
    • https://cdn.sqhk.co/zapiseniw/kjbhhja/teacher_note_to_students_template.pdfIn PDF document text
    • http://tatinupuguwu.22web.org/calculate_mass_flow_rate_of_air.pdfIn PDF document text
    • https://cdn.sqhk.co/sekigozujeme/icKieid/45829321376.pdfIn PDF document text
    • https://kibutudevitage.weebly.com/uploads/1/3/4/4/134499349/ed8a76b7e7.pdfIn PDF document text
    • http://vivudanu.scienceontheweb.net/technology_adoption_definition.pdfIn PDF document text
    • https://cdn.sqhk.co/xugiwatokax/jdhfNQn/ketebaxexoxojedes.pdfIn PDF document text
    • http://lelekelosutov.getenjoyment.net/30793468048.pdfIn PDF document text
    • http://xiwesesakuvel.medianewsonline.com/76471719588.pdfIn PDF document text
    • http://pisazujinatef.iblogger.org/neet_biology_books_in_english.pdfIn PDF document text
    • http://visetazide.medianewsonline.com/ncert_class_12_maths_syllabus.pdfIn PDF document text
    • https://pikupazu.weebly.com/uploads/1/3/4/5/134577858/banexujijuf-kawibiva-voxinurab.pdfIn PDF document text
    • http://gefosezidubajoz.scienceontheweb.net/desodusimasevo.pdfIn PDF document text
    • https://cdn.sqhk.co/javajadoj/fkr6Mhc/91488570237.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://takikixak.rf.gd/zunivure.pdfIn PDF document text
    • http://patudesaruvob.atwebpages.com/public_finance_and_taxation_handout.pdfIn PDF document text
    • http://vatapusaf.rf.gd/gixamerujow.pdfIn PDF document text
    • http://xuvatifovefad.epizy.com/intellij_format_code_using_checkstyle.pdfIn PDF document text
    • http://zizinamejukurep.rf.gd/99931691337.pdfIn PDF document text
    • http://latevafizatum.rf.gd/zorurigulenagosetedebaw.pdfIn PDF document text
    • http://bigapenegig.atwebpages.com/momegabitob.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_off00011f8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F8D 5476 bytes
SHA-256: d2352e878380802f3a6c2d9015ed3e8c6a438881c4c9360e8503cf4e974a8a0b
font_01_sfnt_off00013231.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13231 11224 bytes
SHA-256: a5fda8aaba34422a85f01b6631790ac91fc56697d3a5272f7805df8be8e898f4

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