Malicious PDF — malware analysis report

Static analysis result for SHA-256 06517df0604a0fd4…

MALICIOUS

PDF

45.0 KB Created: 2020-11-07 07:41:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 6325a121b06842660c7121c8be9adceb SHA-1: dd2b88631a166b6ce785b1730bee16ff8475b40d SHA-256: 06517df0604a0fd42162e8b5c50004b7c0bc8df8cb9ae68837d19a5b724bd6de
74 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 document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://traffnew.ru/aws?keyword=obb+and+apk+download PDF link annotation
    • 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://raxatobagato.files.wordpress.com/2020/11/dibobatamumafoxive.pdfIn PDF document text
    • https://tumitom.files.wordpress.com/2020/11/fapejowavamenebosoxizane.pdfIn PDF document text
    • https://vivuvegutofo.files.wordpress.com/2020/11/dark_cloud_2_download_zip_file.pdfIn PDF document text
    • https://mogefemo.files.wordpress.com/2020/11/nukefexevefa.pdfIn PDF document text
    • https://bumukixux.files.wordpress.com/2020/11/property_inventory_template.pdfIn PDF document text
    • https://rokiris.files.wordpress.com/2020/11/zenonia_5_mod_apk_offline_unlimited_zen.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/54863edc-3f7c-4331-9fa7-a62c6c68f47e/zelnite_is_here_guide.pdfIn PDF document text
    • https://tibepitetuj.files.wordpress.com/2020/11/93704159793.pdfIn PDF document text
    • https://wejogude.files.wordpress.com/2020/11/niwasegini.pdfIn PDF document text
    • https://s3.amazonaws.com/senodiw/74144975882.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e84589c8-73d6-42c4-9b99-bea3d7053fa8/rutoleberis.pdfIn PDF document text
    • https://s3.amazonaws.com/fewunadupop/facebook_birthday_notifications_not_working.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/11d3d0c4-e9c9-4460-8ba6-eb79357351b0/xenujezufadivipukawazidu.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006158.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6158 4544 bytes
SHA-256: 7d84a69dd743f3241aab3807a23a7ebb3d4c42278d05309371563a7751ac57cc
font_01_sfnt_off000070d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x70D2 12468 bytes
SHA-256: 9cef38c7601beb4e03a071f29d957d0b6555c9190fba9765542f17870d43f29b
font_02_sfnt_off0000995e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x995E 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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