Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2f20f84507c5fde…

MALICIOUS

PDF

75.3 KB Created: 2021-05-01 11:25:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: ca02fc2d17f4508e945382270fa72f43 SHA-1: 78260b0e2ab9b2698ed8f21a36e56b16a8ec80e6 SHA-256: f2f20f84507c5fdef3643d0f9f9082f0e4f5973309c465c86456755b7e1e9c4c
126 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that redirects to a suspicious domain, masquerading as a guide for Microsoft Project Online. This URL is likely used to host phishing content or distribute malware. The ML classifier and ClamAV detection strongly indicate malicious intent, and the PDF structure suggests it's part of a link farm designed for SEO poisoning or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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
  • 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://xezojetit.ru/strik?utm_term=getting+started+with+microsoft+project+online PDF link annotation
    • http://kepidurenomabo.22web.org/17442361001.pdfIn PDF document text
    • http://xiwupulo.medianewsonline.com/vabolosoma.pdfIn PDF document text
    • http://wamagobegufif.iblogger.org/antibiotic_resistant_bacteria.pdfIn PDF document text
    • http://wurilozi.scienceontheweb.net/how_to_read_the_violin_notes.pdfIn PDF document text
    • http://dusibarupuguli.medianewsonline.com/biology_teaching_methodology_in_telugu.pdfIn PDF document text
    • http://deliwubavamir.mypressonline.com/alguien_esta_mintiendo_karen_m._mcmanus.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/vavapekadoliti/vaxuxaso.pdfIn PDF document text
    • http://muliwavanebebo.onlinewebshop.net/what_are_the_types_of_covid_diagnostic_tests.pdfIn PDF document text
    • http://vumoxijesep.epizy.com/pifikunuta.pdfIn PDF document text
    • http://xeziribosivamis.epizy.com/axure_tutorial.pdfIn PDF document text
    • http://natetakadax.epizy.com/nivad.pdfIn PDF document text
    • http://woxebolinos.rf.gd/grace_s_guide_to_industrial_history.pdfIn PDF document text
    • http://lalowaxe.epizy.com/biconical_antenna_design.pdfIn PDF document text
    • https://s3.amazonaws.com/vufuzewasi/71601509496.pdfIn PDF document text
    • https://s3.amazonaws.com/fizup/autonomous_maintenance.pdfIn PDF document text
    • http://vixugow.epizy.com/74264338315.pdfIn PDF document text
    • http://lexobodigoke.epizy.com/android_games_like_diablo_3.pdfIn PDF document text
    • http://faletabud.epizy.com/distributorless_electronic_ignition_system.pdfIn PDF document text
    • http://zasuwunal.myartsonline.com/nubilevoko.pdfIn PDF document text
    • http://pubodetag.rf.gd/ccrt_for_upsc.pdfIn PDF document text
    • http://bemeridalazobox.epizy.com/verb_simple_tenses_worksheet.pdfIn PDF document text
    • http://vesudakovufif.rf.gd/45775935623.pdfIn PDF document text
    • http://xaramoturowuf.rf.gd/costco_subaru_pressure_washer_manual.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_off0000e467.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE467 5768 bytes
SHA-256: 383ec31fa151c87597d060eea2252f7779a1918b4e7d352ee58ed65dc186e8ba
font_01_sfnt_off0000f800.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF800 11040 bytes
SHA-256: 3904309e6201ca5dd3d58388dd8a820c4bf082f2b2db66bad88bf41d54337441

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