Malicious PDF — malware analysis report

Static analysis result for SHA-256 24983a094822ee76…

MALICIOUS

PDF

42.4 KB Created: 2020-10-24 12:39:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: 864e526d325dd239cd48b2ff33ac1ef4 SHA-1: e350a12396cc07d9b66e40a305337a65c2e69327 SHA-256: 24983a094822ee76d3dfe9224048c821cf8a4e6b0e3c2ec5280ff07febe35aad
154 Risk Score

Malware Insights

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

The PDF contains a link impersonating Spotify, directing users to a redirector URL that ultimately leads to a credential phishing lure. The ML classifier strongly flagged this PDF as malicious, and the embedded link is associated with known malicious redirector infrastructure. The document body, though heavily obfuscated, contains references to the redirector URL.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://rawebitor.weebly.com/uploads/1/3/4/3/134337567/9178806.pdf.
  • 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://cctraff.ru/wb?keyword=empirical%20formula%20questions%20class%2011%20pdf In PDF document text
    • https://rawebitor.weebly.com/uploads/1/3/4/3/134337567/9178806.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366995/normal_5f8fb66a20a00.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378856/normal_5f8d613328e96.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366407/normal_5f87451c76316.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8940/3810/files/77782367795.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/0412/8164/files/noperafisadarobakig.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3309/1496/files/ccna_wireless_study_guide_iuwne_exam_640-721.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6639/9647/files/war_thunder___android.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0487/0553/6150/files/54021928017.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/1673/0799/files/romanticismo_arte_riassunto.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/4702/2492/files/89821281037.pdfIn PDF document text
    • https://s3.amazonaws.com/tetazino/pafatukoniteratevagabax.pdfIn PDF document text
    • https://s3.amazonaws.com/petikamov/51680960781.pdfIn PDF document text
    • https://s3.amazonaws.com/vetamedisoz/seduxitonorop.pdfIn PDF document text
    • https://s3.amazonaws.com/megelugik/a_propsito_de_un_caso_de_neurosis_obsesiva.pdfIn PDF document text
    • https://s3.amazonaws.com/bugutaj/jafegiboxora.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/jitepoxebegogavosisiziji.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_off000065f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65F2 5436 bytes
SHA-256: 4ebfc9b110516e09673b48f94fd1ff13e480511c1f60c21ebf7d79993f825b59
font_01_sfnt_off0000785c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x785C 10484 bytes
SHA-256: 56f29066dab8575214745debe6d5cfcd6131c06a46af215c3ad11fc10801e391

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