Malicious PDF — malware analysis report

Static analysis result for SHA-256 15f26586b865ed9e…

MALICIOUS

PDF

45.1 KB Created: 2020-10-31 13:18:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 868b722ec3540c1552ec8163d80affbb SHA-1: 7b0b14ae5609114628008b353d2b25a7335708fd SHA-256: 15f26586b865ed9ec16015aa550587809024e34211aeaa94340ca726d9e6bf15
124 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with one identified as a known malicious redirector. The ML classifier also flagged this PDF as malicious. The document body text, though heavily obfuscated, contains URLs that are likely intended to lead the user to malicious sites for phishing or malware downloads.

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 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://gettraff.ru/aws?keyword=adaway+android+apk+download In PDF document text
    • https://jivexine.weebly.com/uploads/1/3/1/3/131380908/kafidigakijesoreru.pdfIn PDF document text
    • https://babikovinemixe.weebly.com/uploads/1/3/1/8/131856339/tedafesanisoda.pdfIn PDF document text
    • https://miremewokar.weebly.com/uploads/1/3/0/7/130738658/2458690.pdfIn PDF document text
    • https://polabufasol.weebly.com/uploads/1/3/2/8/132814050/gemibitewamak_gavinunub_foremijowod.pdfIn PDF document text
    • https://zufugorutamivas.weebly.com/uploads/1/3/4/4/134401118/zemisis-barutofitew.pdfIn PDF document text
    • https://zalawevovupat.weebly.com/uploads/1/3/0/9/130969727/d296180d624e27.pdfIn PDF document text
    • https://besavikeneg.weebly.com/uploads/1/3/2/8/132815808/c8d70d8a371a1.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/9a6de94a-f785-4f28-a3e8-cd73edc3c4ee/eva_total_drama_fan_art.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2fd7c3eb-eb30-473b-b550-3c0dc012ad61/unblocked_hacked_bloons_tower_defense_3.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ee939330-8dea-4cc8-9365-44ae9b095929/95471948129.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5ccb12e9-9f06-4827-8ecf-7370bc5cd32b/zosesazivuzakase.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c424c1e8-a2d0-4604-971b-a8e1eb4c7eb5/14569259564.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7630cb4b-8eb7-4fc2-8579-78399593853a/lekob.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ee8b77b2-f567-4d9a-8ac2-bf2f1e1f9364/21962993232.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_off0000726a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x726A 5024 bytes
SHA-256: de5048e3b16f1edb1821da55221921012bbe04d66f88a5cf02950005e985636f
font_01_sfnt_off000083a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83A8 10588 bytes
SHA-256: 0b2a47f381214ec68884e4b9cd5db1b82f6f8b84235f8daa6e7af63d3de766fb

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