Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e4fda3ec3478f19…

MALICIOUS

PDF

45.4 KB Created: 2020-11-09 05:35:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 09e7ebb0f745ae2ae7d2228423ae126e SHA-1: 2431ff6d5fbbefb65d49011a054ff2d517bdc0ba SHA-256: 5e4fda3ec3478f19b6d80d2f17d04798fe76094b999a90714823cfcf29bb1f55
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://traffmen.ru/aws?keyword=friday+night+lights+speech In PDF document text
    • https://cdn-cms.f-static.net/uploads/4421468/normal_5f9f0aa0d47b8.pdfIn PDF document text
    • https://godosofebi.weebly.com/uploads/1/3/4/6/134651625/5291794.pdfIn PDF document text
    • https://rusokupos.weebly.com/uploads/1/3/4/4/134468665/e037825e3645c.pdfIn PDF document text
    • https://rexolofozex.weebly.com/uploads/1/3/4/3/134368018/zivof.pdfIn PDF document text
    • https://worobewunit.weebly.com/uploads/1/3/1/4/131406731/paxukekabejodifewara.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/3fd95418-0535-4781-87c5-d60be90abf69/aoe2_fast_castle_knight_rush.pdfIn PDF document text
    • https://s3.amazonaws.com/fasomusogapovi/puwezunufiw.pdfIn PDF document text
    • https://nuvinifiraf.files.wordpress.com/2020/11/upstar_tv_input_blocked.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e80872cd-3064-40aa-ab8c-8b6aefeeaeef/32872914459.pdfIn PDF document text
    • https://s3.amazonaws.com/votawawo/kijuwekaxove.pdfIn PDF document text
    • https://loserakiza.files.wordpress.com/2020/11/dajakubuvugokarima.pdfIn PDF document text
    • https://s3.amazonaws.com/mazugezijap/download_game_killer_without_root_apk_2018.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_off00006694.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6694 5068 bytes
SHA-256: 0d41419bed61aad66fad4c4b3b2590d2955cf264ad5aa9dbfbae8465c6f94cc7
font_01_sfnt_off000077c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x77C8 10144 bytes
SHA-256: 765cfd1e6b301e79ab6767bf99d648caf97cc6ca1da3d225163d0c79f4c16eed
font_02_sfnt_off00009a94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9A94 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176