Malicious PDF — malware analysis report

Static analysis result for SHA-256 88d2be50297841cf…

MALICIOUS

PDF

79.0 KB Created: 2021-04-02 07:26:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: aaa11cc3b02aaec19f6cd158debca9fe SHA-1: 27b812cf703fd03d381714ce90d899b2e9b83130 SHA-256: 88d2be50297841cfce7f300adfd2d266c2cf45694cdc03da8d4728d9eb0c5bb7
184 Risk Score

Malware Insights

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

The PDF contains multiple embedded links that redirect to known malicious or disposable hosting domains, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly support its malicious nature. While no scripts were directly extracted, the PDF structure and embedded URLs are indicative of a phishing lure designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://dafemum.ru/strik?utm_term=how+many+users+for+rosetta+stone+online In PDF document text
    • http://fapasevusiledap.mygamesonline.org/raxojagojuzoxer.pdfIn PDF document text
    • http://zenajok.medianewsonline.com/birla_mutual_fund_stp_form.pdfIn PDF document text
    • http://gadetebes.sportsontheweb.net/rodizetemizajufila.pdfIn PDF document text
    • http://fusavexupisedi.iblogger.org/13_reasons_why_jay_asher_characters.pdfIn PDF document text
    • http://kazexajisodibu.medianewsonline.com/bharat_acharya_microprocessor_book_download.pdfIn PDF document text
    • http://wudibuniwiwu.22web.org/refudelajukixu.pdfIn PDF document text
    • http://sinoxaju.mygamesonline.org/84479544227.pdfIn PDF document text
    • http://wiboratiraveguw.mygamesonline.org/bobufibeni.pdfIn PDF document text
    • http://wemuwetafivaxe.sportsontheweb.net/algebra_2_book_mcdougal_littell.pdfIn PDF document text
    • http://mevakimuvu.mypressonline.com/wizudeluw.pdfIn PDF document text
    • http://jigatinapa.22web.org/tebipoxuvukebiwew.pdfIn PDF document text
    • http://bobatorosas.mypressonline.com/79837768065.pdfIn PDF document text
    • http://rabisoluvilava.iblogger.org/columbia_shuttle_disaster_report.pdfIn PDF document text
    • http://zutolewe.mywebcommunity.org/64382771593.pdfIn PDF document text
    • http://modozadubop.mywebcommunity.org/bibelot_dfinition.pdfIn PDF document text
    • http://birixuxewazotaz.mywebcommunity.org/nexopiponupesozon.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://zewadomi.myartsonline.com/mejuwifunorejenuz.pdfIn PDF document text
    • http://rudabenikojor.epizy.com/accounting_auditing_accountability_journal.pdfIn PDF document text
    • http://lutepotazor.onlinewebshop.net/latin_quotes_about_life_and_love.pdfIn PDF document text
    • http://makeromevoju.rf.gd/57511639495.pdfIn PDF document text
    • http://joberemig.atwebpages.com/79445542.pdfIn PDF document text
    • http://meduzifovum.epizy.com/wexizozutivoronolunagaj.pdfIn PDF document text
    • http://wutejaxevewef.myartsonline.com/36167101886.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB47 4948 bytes
SHA-256: 9bbc820531b316c9b5d245bb49647552de7e783f584e137db54c9533fd07b77b
font_01_sfnt_off0000fc07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC07 10624 bytes
SHA-256: 27f7fca12db0e5981a6427fe41c00db542b2a2785b53f0739cabd739c06a5b83
font_02_sfnt_off00012043.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12043 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333