Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6044c3c3e54c46f…

MALICIOUS

PDF

70.1 KB Created: 2021-02-07 06:41:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 1bf712f8651fd580fba2e467bfae9ca0 SHA-1: 7b2b3aee8ecc10adfe52fd1d52f50bacb6e15c80 SHA-256: f6044c3c3e54c46f8d30d5ad5190e996aa445be641656441dd7ddbc85ee4fdd0
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, identified by ClamAV as Pdf.Phishing.Trojan. The ML classifier also flagged this PDF with high confidence. While no scripts were explicitly extracted, the presence of an external URI strongly suggests an attempt to redirect the user to a malicious site for phishing or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jottigo.ru/123?utm_term=213+158+173+252+9095 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4427795/normal_600f1f6f3e976.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461786/normal_5fdb608b8983d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421341/normal_6019d50c46381.pdfIn PDF document text
    • https://cdn.sqhk.co/posojuvapono/jahbhda/kosilelaluriwijalez.pdfIn PDF document text
    • http://faceskinagainbeauty.xyz/776968701069i6d4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367940/normal_5fcaa9b580419.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421613/normal_60188b9dece99.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425916/normal_6003c2176c4bb.pdfIn PDF document text
    • https://cdn.sqhk.co/goxobuve/eggkgab/1973_amc_models.pdfIn PDF document text
    • http://yoptan.space/9490341825744m5h.pdfIn PDF document text
    • http://matroskin.space/duvev5c5ri.pdfIn PDF document text
    • https://cdn.sqhk.co/gadewekunel/ehhjfKQ/table_top_racing_world_tour_ps4_pkg.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444850/normal_5feb77099a6e6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448339/normal_600c708578fc3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/resabomibogodaw/fulopivakosoxotoganow.pdfIn PDF document text
    • https://s3.amazonaws.com/tikofaketonub/gaketaxononosotafotu.pdfIn PDF document text
    • https://s3.amazonaws.com/libosokune/contact_lens_fitting_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/tozaduliwubega/52571318704.pdfIn PDF document text
    • https://s3.amazonaws.com/bepukuba/tai_cashwagon_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/rewepalazamiso/88251877223.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_off0000d365.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD365 5112 bytes
SHA-256: 4df6bce9a9be42dd1c06eccd7ba8b37067bd12a90e38f510560850673a7b279c
font_01_sfnt_off0000e4ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4EE 10828 bytes
SHA-256: 34bab359f5b4c138bac6775db91bfb6155741bbfbbcd7a56f8fd659f4aa3af5f

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