Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6515788fb2d2a56…

MALICIOUS

PDF

49.5 KB Created: 2020-10-31 13:45:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 74be0047620cb0ea88e9c104848cf8fe SHA-1: d7c81c47efbddd01b9d683de485ab8b1bbc18708 SHA-256: d6515788fb2d2a560f5a5fb4ba93e3a060efab6bd1ea6693cfce6bec531673bd
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier. It uses brand-impersonation credential phishing. The file routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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://talapilodegopez.weebly.com/uploads/1/3/0/9/130969507/4467144.pdf.
  • 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://ttraff.ru/123?keyword=sonyliv+apk+for+android+tv In PDF document text
    • https://cdn-cms.f-static.net/uploads/4390382/normal_5f9cd949bd172.pdfIn PDF document text
    • https://talapilodegopez.weebly.com/uploads/1/3/0/9/130969507/4467144.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385412/normal_5f9a4c4f5b7ae.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/memul/logedanegamuvafowizuvivaz.pdfIn PDF document text
    • https://s3.amazonaws.com/wixamupelinere/simemuwunadebadomemifi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ae68a87-07f6-4f0d-bf9d-76b2d57339cd/9812865703.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8658b851-e159-4f5f-a179-fb5ab6f9556d/16372759184.pdfIn PDF document text
    • https://s3.amazonaws.com/bakoloj/23731233494.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2201e44e-2bd9-4a31-a5a1-e85769e333ec/gafedafasuvonugiwo.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/all_your_yesterdays_book_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd3ae881-15d7-491c-9bdb-35f92b87c5f1/oxygen_not_included_chlorine_uses.pdfIn PDF document text
    • https://s3.amazonaws.com/gurowozenupifi/sasuxafuki.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006aa2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6AA2 5184 bytes
SHA-256: c64857286d0ce02a370058573ebd73a9f9d6da3418a9f7f3f6b4e90d2a0cd249
font_01_sfnt_off00007c70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C70 11524 bytes
SHA-256: ff14dd22329a3d913945f9c9b4f02eece5cfe31b43ec95668d92f8cd79a84b29
font_02_sfnt_off0000a3d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA3D4 16164 bytes
SHA-256: 4bd16c8abd39118228c1571b0005d4eb3b3e943e572fd92a2a80cfcb7b749349

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