Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8a1245cfe511051…

MALICIOUS

PDF

72.9 KB Created: 2020-11-19 05:28:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: ce499937888fe41369c9d2a235c7a808 SHA-1: 1da20dadaf33dc8b837fa4d2ad1af6d97ff27670 SHA-256: a8a1245cfe511051bc38d247a3655913ffcd03df8e177ac6ef2d4f197ea30d3e
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

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
  • 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.
  • 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.
  • 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://gettraff.ru/123?utm_term=google+drive+john+wick+chapter+3+%25E2%2580%2593+parabellum In PDF document text
    • https://cdn-cms.f-static.net/uploads/4495860/normal_5faeefea12a91.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407086/normal_5f9c849b3a108.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404520/normal_5fa9e1206eb8c.pdfIn PDF document text
    • https://vaxajiwozoli.weebly.com/uploads/1/3/1/6/131637631/7482988.pdfIn PDF document text
    • https://bufobefogefeka.weebly.com/uploads/1/3/4/4/134445289/zaginisifetat.pdfIn PDF document text
    • https://guvorike.weebly.com/uploads/1/3/4/2/134266232/tiwanewisad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383792/normal_5fb32194e75c7.pdfIn PDF document text
    • https://sudusomot.weebly.com/uploads/1/3/4/2/134265470/6ce250e20c0d.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://s3.amazonaws.com/tuxexi/weller_wxd_2010.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/74243243-c7a3-4854-b7b2-92a9dfae5941/jevamezodarip.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/731d5240-d5e1-4fe1-8a70-a9bdd3d1c532/xotegezu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2c0058d6-89e2-4a39-b912-f0e53170e134/satevago.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f8b0ea2-cdaf-470f-8dbe-a6c382745392/89559415157.pdfIn PDF document text
    • https://s3.amazonaws.com/lebaxa/zip_for_brodnax_va.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a68c9bca-5284-40a4-9be7-2d02db97ce8e/59994490265.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe25c288-930f-42b2-9ab2-0ecb9aa78593/69732953904.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b904.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB904 5848 bytes
SHA-256: 6d86f1c70bf7cc980c6fda4a355185ecf96347ebb61b3ae2207e885df63c07af
font_01_sfnt_off0000cce2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCE2 10516 bytes
SHA-256: 6c1711829be92d9d2cb4b0234c2d37941e04ee569a7a2e7375c219508a184ee2
font_02_sfnt_off0000f0ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0AD 16164 bytes
SHA-256: 731768d427d4e765fcf06156833c7a8b33611a9f9c7c28c95afcc3719f046f5d
font_03_sfnt_off000105ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105BA 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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