Malicious PDF — malware analysis report

Static analysis result for SHA-256 09a63a5367fcd8e4…

MALICIOUS

PDF

95.9 KB Created: 2021-03-23 16:59:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 8b16743398e8331bae6b1273a80dea9d SHA-1: 3daf07314f649f279d02f00e0587c1f8abd7d772 SHA-256: 09a63a5367fcd8e4f53142ace16d60b29417e9e7a0a72a91c045619092b6a2b4
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 point to other PDFs, suggesting a link farm or a mechanism for distributing further malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware delivery. The embedded URLs are the primary indicators of compromise, directing users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://xezojetit.ru/123?utm_term=cms+template+wordpress+free PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4414164/normal_600b5a10c2de0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393893/normal_5fca6b4e44cfc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458137/normal_6059f3067c894.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449599/normal_600a570235425.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410674/normal_6020a37ea6b86.pdfIn PDF document text
    • https://cdn.sqhk.co/kupejabel/c5GuGzH/checkers_broad_st_mobile_al.pdfIn PDF document text
    • https://cdn.sqhk.co/pixazizaze/idjbOcZ/wejedezokawu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450340/normal_6042d30147e02.pdfIn PDF document text
    • https://cdn.sqhk.co/vudararemane/kytgf1I/intelligence_services_commissioner_report.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485710/normal_6037061428735.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495686/normal_602e4403650ea.pdfIn PDF document text
    • https://cdn.sqhk.co/pawosuku/SIQicjb/wasazavivimubazawavufas.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389571/normal_603a8718a6bb8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501027/normal_5fe5697c7e9fa.pdfIn PDF document text
    • https://cdn.sqhk.co/roturoda/hfKPVje/lipstick_song_bhojpuri_mr_jatt.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://47e244ab-6b1f-4ae7-97e8-86de5b619f9f.filesusr.com/ugd/e1d12c_475dcf92b931449da7d89c130f177208.pdf?index=trueIn PDF document text
    • https://df4002df-ed14-466c-b758-10ced248c840.filesusr.com/ugd/3b03e6_40515bf972dc4448b80a35d2f2e2a29e.pdf?index=trueIn PDF document text
    • https://b304dada-1952-41b2-af44-d16a3232bb3f.filesusr.com/ugd/c19c34_029a67aca32b496c8a2a4286d9c4f97f.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012281.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12281 4936 bytes
SHA-256: 56bd08bf05dae812d16acaa4829eb832a2cdb333490f2894bdbef4b224fa7869
font_01_sfnt_off0001335a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1335A 1800 bytes
SHA-256: daad3f347a4f42f432ee9983e619a7c063e36761dba5934b469418034847e28e
font_02_sfnt_off00013be8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13BE8 11128 bytes
SHA-256: 382e6f1db125d31023e2d786f274183e94fbdf4539d134a908f11ce1666e4866
font_03_sfnt_off000161f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x161F1 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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