Malicious PDF — malware analysis report

Static analysis result for SHA-256 26b0d768ffa666b8…

MALICIOUS

PDF

73.4 KB Created: 2021-06-09 11:38:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: ebbef03f80fd70c44feaedcfeb74f61f SHA-1: e1e78dd53dd221776e6493809db90638d3e19a8d SHA-256: 26b0d768ffa666b8a2217b319e73f2b3e3eb392ae3fdaa149d032363b26beab1
186 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many of which are hosted on disposable domains and appear to be part of a link farm. The document body, though heavily obfuscated, contains text related to 'Omegle video call online free', suggesting a lure to external content. The presence of numerous external URIs and the ML classifier's high confidence score indicate a malicious intent, likely to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 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.
  • 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://archism.ru/pbw?utm_term=omegle+video+call+online+free PDF link annotation
    • https://kejedavozeve.weebly.com/uploads/1/3/1/4/131483662/juxizino-xuvudijes.pdfIn PDF document text
    • https://kebudojud.weebly.com/uploads/1/3/4/4/134400915/tumiruvinovow_negup.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/03aef802-cf92-4897-8c43-f8ec0d5f24af/bororuriridatojuf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7fe47bb1-b3b4-4aff-bdea-0d43040b66c1/vekulubodimunam.pdfIn PDF document text
    • http://suxogovexig.pbworks.com/w/file/fetch/144895962/16969795598.pdfIn PDF document text
    • http://lebunurivugu.pbworks.com/w/file/fetch/144865098/jebiguraxekunedojubukiz.pdfIn PDF document text
    • http://lomexalipele.pbworks.com/w/file/fetch/144516336/analisis_pelicula_el_circo_de_la_mariposa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d621ff0-2645-4ba8-afbc-53a97350905d/how_do_i_log_into_my_samsung_cloud_account.pdfIn PDF document text
    • http://varulemenel.pbworks.com/f/sin_senos_si_hay_paraiso_temporada_2_capitulo_86.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/858ef5e0-d32c-4a16-ac44-9a84e4f18277/duzomawuroradivibaxa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/74fa039a-5ec2-44ed-b364-3dd10b50a720/3rd_grade_paragraph_writing_worksheets.pdfIn PDF document text
    • http://polubisoxuwo.pbworks.com/w/file/fetch/144505350/xenajinikibelow.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f9290ba-b010-4912-954e-9ecae293490a/what_is_a_zero_hours_contract_of_employment.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9a1e5a98-5aa4-42e6-b356-be3c2524aec9/musovuzivu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b5baa41b-a3a5-4199-9333-97e33dc857b7/47516552809.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5be8995c-6811-449b-ae92-532f4db3e2f3/ejercicios_de_comprension_lectora_para_tercer_grado_de_primaria_para_imprimir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4cc997c9-6dc5-4d7d-bced-22ed2c1ba6b9/74775751274.pdfIn PDF document text
    • http://funuvutidip.pbworks.com/w/file/fetch/144855354/87286644938.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_off0000e0c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0C2 5248 bytes
SHA-256: f1a7726cbfb003356073c41d7237e1edf55545a8466996bd155a42b750efd9f3
font_01_sfnt_off0000f293.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF293 10764 bytes
SHA-256: e75eee58e012c10e69d7d93b7d15c84e744f9b26ef8dc28d563a8414eb373993