Malicious PDF — malware analysis report

Static analysis result for SHA-256 d57cfaee1112c444…

MALICIOUS

PDF

74.4 KB Created: 2021-03-09 13:30:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 470af1e9c7f5d46b5ea2e0d6a0dff124 SHA-1: e870a5149ed95c3ff5ab13aa4469c749e0768033 SHA-256: d57cfaee1112c444e5d46d7abfeb5f00ea9b387ef37945139b43378c1d130813
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, which is a common tactic for phishing campaigns. While no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://xezojetit.ru/aws?utm_term=the+shack+chesterfield+missouri PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4472481/normal_601e27ce0a322.pdfIn PDF document text
    • http://balifruit.com/honda_2000_generator_partsy6mqx.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383680/normal_5fd93703d5f45.pdfIn PDF document text
    • http://reduslimitaly-ufficiale.website/155093600749ceyg.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386621/normal_6023bad037dce.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://d1b33a7b-cde1-45d4-bc15-d4d3b6236ac5.filesusr.com/ugd/1d64af_997ef127213b4a8fb3cd343d74432ec7.pdf?index=trueIn PDF document text
    • https://77a80da1-97a3-4b40-ba11-54c6d232eb66.filesusr.com/ugd/39a0fd_2957cb7c14d4433c9622cbd3c6da3866.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/daniwodug/arya_2_movie_telugu_lo.pdfIn PDF document text
    • https://s3.amazonaws.com/veledabejufi/how_to_insert_latin_numbers_in_word.pdfIn PDF document text
    • https://711920be-b761-4f0e-a604-762b26663b16.filesusr.com/ugd/ffcbea_1c2878e4282a41dea3a9a66a1f8869fb.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/93dcac64-5e63-4344-88a3-8176ebf6c641/sazusodenatawelodigedivi.pdfIn PDF document text
    • http://xedonufil.rf.gd/hungry_shark_apk_mod_unlimited_money.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/75bb2aed-5092-40ad-9347-4e4521bf9aa5/how_to_say_medieval_times_in_french.pdfIn PDF document text
    • https://52ed6390-a5c1-4502-9f93-599cf6d98ad1.filesusr.com/ugd/f7fbc8_f3a48a570a154494a2fb05b4f6360a69.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/nijudow/enharmonics_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/pazovugal/54082820980.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a047b94e-9c7d-4c2b-93f6-62890dd75a99/the_7_habits_of_highly_successful_financial_planners.pdfIn PDF document text
    • http://muxajetolalet.epizy.com/42422304610.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/90fdf01f-68bc-447f-b662-ca677d3f262e/what_is_the_b_word_in_arabic.pdfIn PDF document text
    • https://s3.amazonaws.com/medaliwifufugel/ssf2_0._9_b.pdfIn PDF document text
    • https://f7cac2f2-528f-490f-9bef-cb2448a877de.filesusr.com/ugd/529ba0_315266bc85e64a35a04554b1354089fc.pdf?index=trueIn PDF document text
    • http://jujiruwer.rf.gd/nuborusewevur.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_off0000e579.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE579 5276 bytes
SHA-256: 454756b431cd7d62b7692e7682c54fb6e3447171776c211de7166ed2308aa8e9
font_01_sfnt_off0000f73a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF73A 10944 bytes
SHA-256: 3b7ab93b4a6b039b7a6e112e9aedc325ac5ac1f02158020553819ae2d0d92f63

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