Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9256544aed99f0b…

MALICIOUS

PDF

40.6 KB Created: 2020-11-02 22:11:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: a050ab2507443aae428a3c6eba32b6c7 SHA-1: d1dc59005fe6d7e00f2835016b5fbbb48e680009 SHA-256: f9256544aed99f0b11409a174a8f481500c13e86acd4eec2dfce0658f504bff1
174 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a link to a known malicious redirector, which is designed to impersonate an Office 365 login page. This lure is intended to steal user credentials. The document body contains obfuscated text and a URL that aligns with credential phishing attempts.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://lagukekejase.weebly.com/uploads/1/3/0/8/130815031/931546.pdf.
  • 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.
  • 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://cctraff.ru/123?keyword=owa+emory+edu+login In PDF document text
    • https://lagukekejase.weebly.com/uploads/1/3/0/8/130815031/931546.pdfIn PDF document text
    • https://xilorufanil.weebly.com/uploads/1/3/0/7/130739938/8438231.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403683/normal_5f9d6b1d84c0b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366984/normal_5f87423b2c587.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/4404/2433/files/96947037392.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0505/2792/8520/files/getapenomeluw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/76d53e1b-4ef4-4aef-ad35-3263b56b7725/46245164404.pdfIn PDF document text
    • https://s3.amazonaws.com/gitipelut/best_app_for_ipad_2018.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/3181/9936/files/sumunonizisaxiget.pdfIn PDF document text
    • https://s3.amazonaws.com/remufuzu/kenetrek_mountain_guide_discontinued.pdfIn PDF document text
    • https://s3.amazonaws.com/luropi/92805860868.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/844c7771-2c4a-4163-8d09-3d87d8afb4d5/83004510898.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/7435/3850/files/nodiluseviti.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9692/3543/files/3_letter_word_start_with_d.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_off00005fda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FDA 5188 bytes
SHA-256: f5ca6b26ea51c3b6844c079e2315807017d2d96f0d679badc44da7c5a07b85be
font_01_sfnt_off00007180.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7180 10748 bytes
SHA-256: b740ea317de128747ce1284f5c84ba5128daebc30717fb07297691a35139ba8d

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