Malicious PDF — malware analysis report

Static analysis result for SHA-256 d752bfbb1889fffb…

MALICIOUS

PDF

76.6 KB Created: 2021-03-18 08:56:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: c5d1532b432b985ed4c7adc366f16c57 SHA-1: 60326dceeed16a23b40dc943cbce005405650bf3 SHA-256: d752bfbb1889fffb619f0bf53f51b369d13aece4592a0d4257f385f034c748c3
214 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to redirector infrastructure and known malicious domains. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' and 'PDF_SEO_LINK_FARM' indicate a deliberate attempt to direct users to harmful sites. The ML classifier and ClamAV detection further support the malicious nature of this file, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/aws?utm_term=dell+u2410+vesa In PDF document text
    • http://wupemokabate.scienceontheweb.net/83469303061.pdfIn PDF document text
    • http://bosuxezaxad.mypressonline.com/59647851350.pdfIn PDF document text
    • https://voximarabot.weebly.com/uploads/1/3/1/3/131383255/lomox-milosi-gajife-vagiduzovis.pdfIn PDF document text
    • https://wixozini.weebly.com/uploads/1/3/4/3/134383912/wukelilaxem_zazasanaza_webesukadolovut_tavelewe.pdfIn PDF document text
    • http://rapalafipotofuw.iblogger.org/52330308047.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://radagosedapisat.epizy.com/41771636005.pdfIn PDF document text
    • https://s3.amazonaws.com/pululusodogi/anytime_fitness_membership_transfer_form.pdfIn PDF document text
    • https://6200e599-3f2f-4e3e-ab45-e6977ed7e777.filesusr.com/ugd/f8de3e_9f85373c1136421bb607a920b315d1a6.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/nunakixuma/48882345899.pdfIn PDF document text
    • https://s3.amazonaws.com/vanatul/mini_bluetooth_elm327_car_diagnostic_scanner_review.pdfIn PDF document text
    • http://fezabum.rf.gd/who_is_the_dynamic_character_in_thank_you_maam.pdfIn PDF document text
    • https://50bf384a-eeac-4f26-a262-e2ba1a5e00ba.filesusr.com/ugd/17159d_8f95c1a9cb7d474985a15014487bdace.pdf?index=trueIn PDF document text
    • https://2e81f42f-67f9-46a9-89e2-a5f3ab3b03ee.filesusr.com/ugd/f138f5_9a9496de289e4766b8da2fc6ef9a4ef3.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dikobepibelun/hamlet_1996_movie_free_download.pdfIn PDF document text
    • http://juxugalipexobow.epizy.com/black_and_decker_air_fryer_toaster_oven_instructions.pdfIn PDF document text
    • http://bepinodobax.rf.gd/where_was_the_day_of_the_outlaw_filmed.pdfIn PDF document text
    • https://s3.amazonaws.com/gazijewevan/cerere_de_angajare.pdfIn PDF document text
    • https://s3.amazonaws.com/tarizirefevifab/cambridge_key_for_schools.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_off0000ee32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE32 5056 bytes
SHA-256: 6d107f287307a31aa79575395df90958eced92ff875d60a79279ae18e0533266
font_01_sfnt_off0000ff8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF8E 11168 bytes
SHA-256: 32ce58c3b7fa565be4978e57bf2df66c1f5f1d24fdb1249ad615d7fd3aada15a

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