Malicious PDF — malware analysis report

Static analysis result for SHA-256 9947375667a4821b…

MALICIOUS

PDF

81.2 KB Created: 2021-03-21 08:17:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d9b7b804a5f8ea6beef52b60364d2bad SHA-1: 1b7b2e8331360dd9cb2b669719c84809d09db537 SHA-256: 9947375667a4821bebebe537fc02be4c61e359cf81168d56e80dd813cec38f1a
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, which is likely intended to host a malicious payload or redirect the user to a phishing site. The document body, though heavily obfuscated, suggests a lure related to educational content to trick users into visiting the malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://jacksth.ru/wix?keyword=chemistry+chapter+3+reading+guide+answers
    • https://wefupavoxed.weebly.com/uploads/1/3/2/6/132682659/2492807.pdf
    • http://erkutungotu.com/kujusiwoxawixukotonopoe3maf.pdf
    • http://item-mask.top/6644128332367ttq.pdf
    • http://srakan.space/88091999608uesa6.pdf
    • https://wemupubipu.weebly.com/uploads/1/3/5/3/135331653/debaf_fojumasun_kafimabeki.pdf
    • https://numesenara.weebly.com/uploads/1/3/1/0/131069843/1658695.pdf
    • http://tradestaroffice.com/98694265775sz3ux.pdf
    • http://indital.space/msds_sheets_for_office_depot_cleaning_duster4hgol.pdf
    • https://bugagage.weebly.com/uploads/1/3/5/3/135330359/6711673.pdf
    • http://dwatches.site/95259934660qumg7.pdf
    • https://zuduloto.weebly.com/uploads/1/3/4/6/134623707/3481824.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://jefokid.rf.gd/lugebun.pdf
    • https://s3.amazonaws.com/musokejixami/wondershare_mirrorgo_latest_version_free.pdf
    • http://dewabop.rf.gd/64559330318.pdf
    • http://bavifawelaxasag.epizy.com/43203014844.pdf
    • http://nitovotiroxe.epizy.com/netpatch_firewall_mod_apk.pdf
    • https://s3.amazonaws.com/muxegeza/clipart_pirate_hat_template.pdf
    • http://filutapokupa.epizy.com/xapiparedetemivomaxaw.pdf
    • http://sopugagavot.epizy.com/cfms_bihar_form.pdf
    • https://s3.amazonaws.com/sefepugolupalax/48032501903.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f096.bin
4dde7a8fb7924d79029b3d0f51090d8f243c8c95ad593c63adde85aff05b4401
pdf-font-stream PDF embedded font (sfnt) at offset 0xF096 5608 bytes
font_01_sfnt_off00010392.bin
df047b59b8763efeeb59433b2858661d38ad165a9c0a0075460e79399972a4b2
pdf-font-stream PDF embedded font (sfnt) at offset 0x10392 11232 bytes
font_02_sfnt_off0001290e.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3
pdf-font-stream PDF embedded font (sfnt) at offset 0x1290E 4324 bytes