Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2824bc895862af0…

MALICIOUS

PDF

75.9 KB Created: 2021-04-07 20:44:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 7ea27f810a564ab7fcc3a419cbb734cd SHA-1: e2fb213d9214039c287efc871a511f3dc002cc07 SHA-256: e2824bc895862af09fac9796eb222250a09837f19072ccaa297d7e3b79d48a1d
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, as indicated by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or phishing attempt. The embedded URLs point to various domains, many of which are hosted on free services like Weebly and scienceontheweb.net, commonly used for distributing malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

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
  • 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://seumenha.ru/strik?utm_term=how+to+pair+signia+hearing+aids+to+android PDF link annotation
    • https://fitisasituwag.weebly.com/uploads/1/3/4/8/134846324/8590502.pdfIn PDF document text
    • https://damexizatu.weebly.com/uploads/1/3/4/7/134736049/siforivolutepeli.pdfIn PDF document text
    • http://xikisavi.scienceontheweb.net/life_cycle_of_malaria_in_human.pdfIn PDF document text
    • https://wigawiwamenusum.weebly.com/uploads/1/3/5/3/135323889/vujarogirisedupitebi.pdfIn PDF document text
    • http://wivikaxebox.medianewsonline.com/advantages_and_disadvantages_of_internet_file.pdfIn PDF document text
    • http://jotitojimo.mygamesonline.org/56059539169.pdfIn PDF document text
    • https://xuvakaxatal.weebly.com/uploads/1/3/1/0/131070170/kesigonu-gasamakodomuxo.pdfIn PDF document text
    • https://nimamadud.weebly.com/uploads/1/3/1/8/131856523/3354402.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/959cbacf-97c2-4830-abae-e2c5df7d2f20/luthien_and_beren_poem.pdfIn PDF document text
    • https://s3.amazonaws.com/zuvovoxigumuz/examples_of_nonconformity_in_songs.pdfIn PDF document text
    • https://s3.amazonaws.com/tumasun/nudiz.pdfIn PDF document text
    • https://s3.amazonaws.com/sinadi/niror.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e5f008af-e236-4058-8721-2c3ae1e518d4/xebaraxalawejazepolo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/54bb67d7-cc4b-4fda-b463-f71c9f61a342/ruvazutovesow.pdfIn PDF document text
    • https://s3.amazonaws.com/donarepemi/kefupizopawo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f2111d8-2dbd-48b1-b3ff-fe45b9a73291/95260612418.pdfIn PDF document text
    • https://s3.amazonaws.com/nunakixuma/biology_class_11th_ncert_book.pdfIn PDF document text
    • https://s3.amazonaws.com/fewifuwu/rutatowubeber.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_off0000ed74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED74 5244 bytes
SHA-256: e51ae60b011d5ed1b3cd153516d7527133f2e37b6d0b7fc06929aec8e1fcee26
font_01_sfnt_off0000ff4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF4E 10200 bytes
SHA-256: ba39d5233e1bb58163472196b006d9b6200eca65adc176d9a9fcb44c56b90b31

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