Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1a697dc7eb5d2ba…

MALICIOUS

PDF

56.0 KB Created: 2020-10-15 09:32:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 98a978fd5e6fa0cd9a0b0005cb9373a2 SHA-1: 40fbd5b68ac823d57a5964f2bdaac971a54669ca SHA-256: a1a697dc7eb5d2ba893f34793039721b089503386636701d155804984bd9bb3f
184 Risk Score

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.
  • 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.
  • 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.
  • 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://ggtraff.ru/strik?keyword=lux+lite+apk+mirror In PDF document text
    • https://rutaluxunenore.weebly.com/uploads/1/3/0/7/130740368/20e96c8807.pdfIn PDF document text
    • https://site-1042016.mozfiles.com/files/1042016/so_too_either_neither_worksheets.pdfIn PDF document text
    • https://site-1038604.mozfiles.com/files/1038604/tikofasijupokofakexab.pdfIn PDF document text
    • https://site-1036920.mozfiles.com/files/1036920/81090417580.pdfIn PDF document text
    • https://site-1043095.mozfiles.com/files/1043095/2758150132.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365582/normal_5f87075e9b964.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365600/normal_5f870a963b462.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369174/normal_5f87a86271bbb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366661/normal_5f8730d6ea58f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/23b59a04-7990-44a2-ad7c-9d4183fdd3e0/28754873429.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c87c2e8f-c19c-4981-835e-caefe59915f4/87770966384.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/25f65a73-1e22-46e5-bcb8-fcd9ee3f58c6/17041222694.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/3039/2227/files/78396989168.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/1412/3428/files/sports_complex_marketing_plan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0472/2914/1157/files/fugovafinefazenadolasa.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://scripts.sil.orgIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off00009aa8.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x9AA8 19008 bytes
SHA-256: 81139fe58ce2a542c2b9ae7992ed71986b3ad79645b98857ff5e36520d230b89
font_00_sfnt_off000063d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63D2 4860 bytes
SHA-256: b0503cd4fc5aa3b06dd6aafceaa227e3226c409a634cec84bd9afd2cbe7a2dc8
font_01_sfnt_off00007446.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7446 11608 bytes
SHA-256: f8572439c33e79ac7ac16430a1d3c604e8ebea207bc23aed663736b441e8c82a
font_03_sfnt_off0000b978.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB978 8268 bytes
SHA-256: 2546cc65f3275943fe0dc323e010bd03ed51e92b78024a507403bd5b8eaa5850

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