Malicious PDF — malware analysis report

Static analysis result for SHA-256 a692f24202b1dbfe…

MALICIOUS

PDF

37.6 KB Created: 2020-10-30 18:20:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 7cab8a32ea72451db317af334312d1b9 SHA-1: de0b8fb9dc54a889e40fe83dd63bc743aecdca9c SHA-256: a692f24202b1dbfe6ea60a80928d51cf0f66d94bf1f009876874ee42d8ec9f9b
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

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 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/strik?keyword=potty+racer+hacked In PDF document text
    • https://cdn-cms.f-static.net/uploads/4374704/normal_5f89f2c053412.pdfIn PDF document text
    • https://zukamukenipebo.weebly.com/uploads/1/3/1/3/131380388/xirebakuxevafetesa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378605/normal_5f94f25e6eaa1.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://uploads.strikinglycdn.com/files/2dcfc205-825c-434a-b66c-9ef9336cfeaa/veronique_estel_aux_obseques_de_ferr.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bb309ee3-20ba-46e8-9edc-ceabe133791b/ganij.pdfIn PDF document text
    • https://s3.amazonaws.com/dalava/vitamin_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fa76199f-0022-493d-9399-2132ad6f0edd/newufugivami.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/459a326c-cc98-4734-a7bf-bb358cd6fb28/40853417469.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0503/5317/6734/files/android_constraintlayout_match_parent.pdfIn PDF document text
    • https://s3.amazonaws.com/tadovu/astrology_learning_books_in_marathi.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxadol/zonetevibadija.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e3df7837-1fee-4b4f-ada7-f31a499f7576/biraluzevowezurajotesatek.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/0095/7608/files/vitewelubu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6114/9850/files/soluwaremosupizev.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/0910/0957/files/android_outlook_contacts_duplicates.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/3120/2472/files/kurio_7_tablet_charger.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_off00004b6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4B6C 4616 bytes
SHA-256: 1b45b12cb09cd71faf2a966c965e347ccf5769640d25bd65ec34934eb50606d1
font_01_sfnt_off00005b28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B28 9492 bytes
SHA-256: d696ed87c7b7e885ff83b59f45002a300104ed39519a35b46d9d617ca605f1e2
font_02_sfnt_off00007b34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B34 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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