Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9785b6be2565490…

MALICIOUS

PDF

95.0 KB Created: 2021-04-06 12:01:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 222b007ebd0e0bf17817d768ff0f923f SHA-1: 5303539f614a890081e1b477a329d95805e3cfe4 SHA-256: e9785b6be2565490f82596c6a8f453740d9f88bb4db1bf9c455bc3ab5417b7be
156 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. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • 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://leonvi.ru/aws?utm_term=city+university+london+bar+professional+training+course PDF link annotation
    • https://cdn.sqhk.co/vuxaxebowe/icchbjh/wuwawosuvudojelotewafan.pdfIn PDF document text
    • https://cdn.sqhk.co/kisesawaropo/fghhmhc/sudof.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421209/normal_6045ba646b037.pdfIn PDF document text
    • https://cdn.sqhk.co/zudilubal/Vid1ifH/walmart_inhome_delivery_careers.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404500/normal_6041a4a39828b.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://uploads.strikinglycdn.com/files/e10ba4ce-8bc0-4a9b-8e84-27b00bfbfba2/best_richie_havens_albums.pdfIn PDF document text
    • https://720c7b34-a033-4bf0-83ea-6be17de98aa2.filesusr.com/ugd/03ef8e_c2dad2152bdc4c9bb1a2b082226a7b32.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/e6de8477-3bca-49f2-91f3-acc24a926fea/venta_airwasher_cleaning_instructions.pdfIn PDF document text
    • https://s3.amazonaws.com/tikoweravisixu/audio_bible_commentary_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d3e85434-4867-44e5-9dac-7ad1898a4fe1/84675735737.pdfIn PDF document text
    • https://s3.amazonaws.com/punagilelabon/how_to_cut_butter_lettuce_from_garden.pdfIn PDF document text
    • https://4da44922-6ee1-4515-aed7-54c3d6b51f77.filesusr.com/ugd/243a28_78c56d39f57844508dd773f08a2679b4.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/f1aca2da-a904-48e5-8240-77f413ee0c1b/jutesajobudedutiro.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f63d0d0a-8d6f-452e-a97e-e47f42efbc9b/ashab_e_kahf_location.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c4f2b64e-f7c4-4f65-a851-c3202b852581/daxuranofuvexap.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001258b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1258B 5528 bytes
SHA-256: 126c65c42b100d210dc426840c50131ac3d2da245e044b82d113472a512550c7
font_01_sfnt_off0001386b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1386B 11748 bytes
SHA-256: 83f2d224aefbf49ee5ae529d699c40ecf46bc081a83f259548d19067ea0e0646
font_02_sfnt_off00016048.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16048 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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