Malicious PDF — malware analysis report

Static analysis result for SHA-256 bfce53398b348136…

MALICIOUS

PDF

258.9 KB Created: 2021-04-03 05:18:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 439075073ad3a5ff9602463c3d158462 SHA-1: 8e9450fc5f0c2a9eed3e9eac71003742cba5803c SHA-256: bfce53398b348136c41f8e6c1767f2480b8b77a62832121ce636f264b62b36fa
256 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It employs social engineering tactics by luring the user to install a browser extension or plugin, a common method for malware delivery or credential theft. Furthermore, it directly requests sensitive recovery secrets or private keys, indicating a high-risk phishing attempt. The presence of an external URI suggests it may attempt to download additional payloads or redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9324

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://baarspo.ru/123?utm_term=firefox+quantum+esr PDF link annotation
    • http://dudoguxu.22web.org/brushed_cotton_fitted_cot_sheets.pdfIn PDF document text
    • http://christmas-gift.ru/dakejonaxelezobebuvedabtnxeg.pdfIn PDF document text
    • http://losewunisa.22web.org/gagikuwapotibus.pdfIn PDF document text
    • http://naturaitalia.space/cartoon_channels_on_spectrum_tvzlgpi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/770163d4-608f-4c8d-89cf-4be89af7a748/18156308691.pdfIn PDF document text
    • https://s3.amazonaws.com/jalasilunaz/isro_moon_lander_vikram_latest_update.pdfIn PDF document text
    • http://nedeponup.rf.gd/relivipifunijokexobu.pdfIn PDF document text
    • http://pojakopov.epizy.com/6073522795.pdfIn PDF document text
    • https://eee7329a-c4d5-4508-a8fd-a8ba515f7d9f.filesusr.com/ugd/5ed802_78b06725a9634af98d3274b6c1def7c9.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/0881f8ed-33c9-4852-b5c6-bc96cb982663/xurumo.pdfIn PDF document text
    • http://bobujosu.epizy.com/nilabefefivojujezurevola.pdfIn PDF document text
    • https://2c91b947-1dd8-401e-ae91-d595f2f75867.filesusr.com/ugd/0af078_5d7e46be797d42eea21d0ff145279421.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/savukojubusum/ttulos_de_crdito_nominados_e_innominados.pdfIn PDF document text
    • http://palumigokaximeg.epizy.com/71459612780.pdfIn PDF document text
    • http://nikibalanijesaf.rf.gd/64286543105.pdfIn PDF document text
    • https://113c517c-d7b0-4b36-99d7-6722bcb7ef36.filesusr.com/ugd/8e66a5_8209e6033fdf4b6683577fcc0efac2ef.pdf?index=trueIn PDF document text
    • http://vonopexurobuma.epizy.com/innovative_website_template_ideas.pdfIn PDF document text
    • https://s3.amazonaws.com/sefipa/what_is_the_scarlet_pimpernel.pdfIn PDF document text
    • http://jeduxotikeg.rf.gd/crescendo_in_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/wizidimawag/64550464733.pdfIn PDF document text
    • http://gavadupuwegak.epizy.com/74255792057.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/18232b5b-ef47-4b5f-8fca-22441fcde584/59342962600.pdfIn PDF document text
    • https://s3.amazonaws.com/gotenukevepunin/dance_like_song_download_djpunjab.fm.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0003b9ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3B9EC 5028 bytes
SHA-256: 5c0462e21f6e2486430bfc140a986d77752de9085e9113aae046e62e6be0e2d0
font_01_sfnt_off0003caff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3CAFF 12308 bytes
SHA-256: 0d44f0b3778fe219abf24fa7a1bf84139a457d2e1cf05c93f8413b2369f3b481
font_02_sfnt_off0003f4e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3F4E0 1736 bytes
SHA-256: f27f1dab863be407bc80ce69f069aaa000ada345c50a5fba1d6b915b5f603bb6

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