Malicious PDF — malware analysis report

Static analysis result for SHA-256 15b66cab28750260…

MALICIOUS

PDF

81.6 KB Created: 2021-03-17 05:56:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 2dcad42a79f2d9ee4fdbaae7ff843859 SHA-1: d6afbdc52e577b6ac42b18a60d02eb6fe47154dd SHA-256: 15b66cab2875026023dfc4fde64330aa023e444daa7850dc7f36131003b516dd
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are dynamically generated, suggesting a link farm or phishing lure. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs point towards an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • 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.
  • 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://midufefew.ru/strik?utm_term=is+fox+sports+southwest+on+dish PDF link annotation
    • http://saduzemed.mypressonline.com/1727563031.pdfIn PDF document text
    • http://jerimujolegem.medianewsonline.com/reading_and_writing_in_english.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390330/normal_60133235135af.pdfIn PDF document text
    • https://ginadilu.weebly.com/uploads/1/3/4/7/134768391/8566460.pdfIn PDF document text
    • http://jujovobima.getenjoyment.net/81609138717.pdfIn PDF document text
    • https://vebupewisagamuz.weebly.com/uploads/1/3/4/7/134704660/82545f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470523/normal_5ff769e9c7aad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409997/normal_604673de39ad4.pdfIn PDF document text
    • http://wiwajekirutiw.scienceontheweb.net/mutamibijeluxiwezobatobok.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
    • https://504706c9-3a86-45eb-876a-6494ef133fff.filesusr.com/ugd/80c1db_ea0017702a27445794dc142f7bf1485d.pdf?index=trueIn PDF document text
    • https://6afed14e-2b01-442b-8c2e-11a8a6f39965.filesusr.com/ugd/46a5ae_f017a11a6cc640309bc7b8ae247b9b85.pdf?index=trueIn PDF document text
    • https://234a0c07-d908-4261-bb83-16b3c96a9b04.filesusr.com/ugd/73e0e6_d5278db771ea42179e49cb44770dfbd7.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/benubapopikaj/jobonamafe.pdfIn PDF document text
    • https://s3.amazonaws.com/paxuvagal/kpmg_bursary_application_form_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/godewumazek/editable_excel_calendar_templates.pdfIn PDF document text
    • https://s3.amazonaws.com/lixuduwonifa/neonatal_sepsis_guideline_uk.pdfIn PDF document text
    • http://padusij.onlinewebshop.net/cambridge_key_english_test_2_listening.pdfIn PDF document text
    • https://71b4061d-0fbe-47a8-a671-08758978b022.filesusr.com/ugd/0216f2_d73f8358359544ff9fbe4efeca9230c5.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/paropabaru/body_cavities_anatomy.pdfIn PDF document text
    • https://0b609444-e5a2-4a7e-9779-a3c6bae51a53.filesusr.com/ugd/529dbf_3a160030c53d4e6eb679820d9e9817d3.pdf?index=trueIn PDF document text
    • https://19f621d4-ab03-49b5-bf1d-c78de40104d4.filesusr.com/ugd/bc84a3_24068ef13de3448193d779bcc33ba764.pdf?index=trueIn 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_off0000f24e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF24E 4864 bytes
SHA-256: 8c73a16d4fee27dfea5dcd25a99ccb197c3d5474499237b30f9283f8d93c1aae
font_01_sfnt_off000102e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102E7 11616 bytes
SHA-256: e67ea9e678a6a8d2a2e97bb4574c1cfcf88687628c3689c1379627324ba0b34b
font_02_sfnt_off00012acd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12ACD 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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