Malicious PDF — malware analysis report

Static analysis result for SHA-256 38bfbdaee75a3c4b…

MALICIOUS

PDF

87.8 KB Created: 2021-03-05 02:40:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 8b9eed314108b7715cee684ef829811e SHA-1: f69636888dbd17c6b2e2962ab0b63ef6ac69371e SHA-256: 38bfbdaee75a3c4bde031361060f08b0e6323a1b4c74cfb7ac6c17725d87a1c7
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, and is flagged as a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://botokaw.ru/123?utm_term=you+raise+me+up+sheet+music+cello PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4383928/normal_5fd68b13c25ca.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404753/normal_5ff23318cefe3.pdfIn PDF document text
    • http://diviwisomos.22web.org/lavodubu.pdfIn PDF document text
    • http://poxinezov.iblogger.org/99958655603.pdfIn PDF document text
    • http://tryporte.xyz/bosebogimuvabov58dpe.pdfIn PDF document text
    • http://fruit-italy.space/trastornos_alimenticios_omsy356r.pdfIn PDF document text
    • http://rafale.store/mubutupomubevurulenkw50.pdfIn PDF document text
    • http://murerejomijuv.22web.org/79425838767.pdfIn PDF document text
    • http://mifukuvij.iblogger.org/political_science_class_11_notes_in_hindi_download.pdfIn PDF document text
    • http://scriptbook.xyz/gojiwevag4wdbe.pdfIn PDF document text
    • http://zawugexoj.22web.org/simplified_icse_chemistry_class_9_answers.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479932/normal_5fdc056d856b4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zozezofi.rf.gd/21609875013.pdfIn PDF document text
    • https://s3.amazonaws.com/meludav/calculate_time_in_excel_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/mibiwivanetuj/android_aes_encrypt_decrypt.pdfIn PDF document text
    • http://sivigowukom.epizy.com/low_back_pain_in_pregnancy_guidelines.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f57c1aaa-5b52-440c-9b63-ae989f160bc0/how_to_handle_a_new_team_as_a_manager.pdfIn PDF document text
    • https://s3.amazonaws.com/rebesudanolo/amplitude_modulation_lab_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/sebunuzu/61589143015.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cfc45afc-ae76-4650-bab5-1b2c27ac2cbb/30634118255.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001063b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1063B 5136 bytes
SHA-256: 576189118c753a6caf3613c670e3d2d5278ce17adc51e2f0a94285b66759c75d
font_01_sfnt_off00011786.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11786 10956 bytes
SHA-256: 1cf646c4adcde20bc72de63bf7b450d789b48acd5b6fabd80bc1614415fa6a32
font_02_sfnt_off00013ce5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13CE5 16100 bytes
SHA-256: b59afbb2f683942213df284fd86cd9422ada0c5f1ffac7698db8c94a40390bc4

Open this report in the interactive analyzer, or submit your own file for analysis.