Malicious PDF — malware analysis report

Static analysis result for SHA-256 96c5f2c4a30a6c43…

MALICIOUS

PDF

45.5 KB Created: 2020-10-05 01:27:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 05c4829312467c2eba5b1c5e83dd7dcf SHA-1: a9bcb026a8edb23bc0cd1bae99fcb48f04728f6f SHA-256: 96c5f2c4a30a6c43317f58f7dc1d86672712bb0162a486b36031f9650b47cddb
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=history+one+direction+piano+sheet+music+pdf In PDF document text
    • https://site-1038703.mozfiles.com/files/1038703/vojeza.pdfIn PDF document text
    • https://site-1039156.mozfiles.com/files/1039156/kezugubuvofozisid.pdfIn PDF document text
    • https://site-1039390.mozfiles.com/files/1039390/53735643538.pdfIn PDF document text
    • https://site-1036722.mozfiles.com/files/1036722/josubed.pdfIn PDF document text
    • http://lopanisu.dahliaspourhouse.com/uploads/1/3/1/0/131070420/zupiwog_nujapejevopuni_viduj.pdfIn PDF document text
    • http://faxasa.habitimprintz.com/uploads/1/3/1/4/131453540/1a373db4b83.pdfIn PDF document text
    • http://files.prosocialstudies.com/uploads/1/3/1/8/131860060/9c9eedcd36.pdfIn PDF document text
    • http://files.owius.org/uploads/1/3/0/7/130775795/3029596.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/52c7c24a-eca3-4709-84dd-28b639d45fe4/ginixulu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c11bcd50-ea91-4c3b-a719-b14be0cb7fa6/wudewadezerud.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/28b7b568-da1b-4a94-90c4-3a35eb84c9c6/85455205850.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c52bac63-8200-45f8-aef4-217793e91fbf/kixuvumowezerese.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/51531804-41a0-4979-b591-8af5c1a30d8d/5707030384.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/3262/8376/files/36775031242.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/8840/7448/files/piecewise_function_grapher_desmos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7333/1609/files/frigidaire_stove_manual_self-cleaning_oven.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0449/8151/8494/files/navoxewasu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1095/6196/files/tamefakafasoxobepi.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_off00006593.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6593 5308 bytes
SHA-256: 3783d959bbdb24c5294f0680934eb1cbcdc32db3b86134a2bc37f31c872188ab
font_01_sfnt_off0000776e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x776E 10248 bytes
SHA-256: df3fd03198c8a1742c4d1238a69347709e17b956627562a50f49e8cbba993727
font_02_sfnt_off00009a81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9A81 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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