Malicious PDF — malware analysis report

Static analysis result for SHA-256 db37396f979cdb38…

MALICIOUS

PDF

420.0 KB Created: 2021-01-15 04:54:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: ab1afda11ae9598b057fbf2e16bbbad5 SHA-1: 48f4b2ef7b6dc01c7b78d5aac6f456d75add6aa7 SHA-256: db37396f979cdb3824caee58a5c8140b095f81e68fc2ec9acf77827ee6cc181e
256 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1566.002 Spearphishing Link T1059.007 JavaScript

The PDF document exhibits multiple critical heuristic firings indicating a credential phishing lure, specifically impersonating Amazon. It contains embedded URLs pointing to redirectors and potentially malicious content, including one URL that appears to be a direct link to a PDF hosted on Weebly. The ML classifier also flagged this PDF as malicious, supporting the phishing and potential trojan delivery intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9287

Heuristics 7

  • 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.
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://tilawebaxipas.weebly.com/uploads/1/3/4/5/134576196/rekegedewidopebu.pdf.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://traffking.ru/aws?utm_term=beast+quest+gameplay PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4376101/normal_5fad34cce0d13.pdfIn PDF document text
    • https://cdn.sqhk.co/lenawemijixe/hjjj3gh/wivokaba.pdfIn PDF document text
    • https://tilawebaxipas.weebly.com/uploads/1/3/4/5/134576196/rekegedewidopebu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414869/normal_5ffd5e1d6a89c.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://s3.amazonaws.com/muvemasoxaji/stormy_monday_t_bone_walker_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/jezaxojipevu/rimolu.pdfIn PDF document text
    • https://s3.amazonaws.com/pizivurapab/asus_rog_gladius_armoury.pdfIn PDF document text
    • https://s3.amazonaws.com/baritexovopa/mortgage_calculator_excel_template_uk.pdfIn PDF document text
    • https://s3.amazonaws.com/pizivurapab/4428673965.pdfIn PDF document text
    • https://s3.amazonaws.com/tejuvonixag/61674262403.pdfIn PDF document text
    • https://s3.amazonaws.com/lumixi/mortgage_loan_originator_test_study_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/sefepugolupalax/emulator_switch_apk.pdfIn PDF document text
    • https://*.example2.comIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00062a53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62A53 4940 bytes
SHA-256: e0a2ffb074f338a0e2dea7ca231bcbb3612a8499d209c066be1332efccda3292
font_01_sfnt_off00063b31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63B31 17800 bytes
SHA-256: 7447dcb0ffced836a31618cfb981e572ca4870d86b4b0e63b4503a7bb835f36b
font_02_sfnt_off00067296.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x67296 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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