Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ab47c63aecf3bef…

MALICIOUS

PDF

77.7 KB Created: 2021-03-24 07:29:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: ebc4aaf8f4bfc50605caa109c6c8f37c SHA-1: 69082be2e6c66286f95fb9b24e846f49854eca80 SHA-256: 8ab47c63aecf3bef44081549092488909492780c7d29db953c0eb03f6aaf457d
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by an ML classifier and contains a significant number of external links, indicating a link farm or SEO manipulation attempt. The presence of multiple disposable domains and UTM parameters suggests an effort to redirect users to potentially harmful content or to obscure the true destination. No scripts were extracted, but the structure and URL patterns are indicative of a malicious document designed to lead users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://soxebez.ru/strik?utm_term=blues+licks+slide+guitar+open+g PDF link annotation
    • http://cabinetsly.xyz/what_the_conflict_in_harrison_bergerona5mld.pdfIn PDF document text
    • https://cdn.sqhk.co/samekikogeri/daE5hbl/97907024385.pdfIn PDF document text
    • https://cdn.sqhk.co/demexadol/ygdgegi/love_letters_for_girlfriend_in_spanish.pdfIn PDF document text
    • https://cdn.sqhk.co/kerametunal/YnUhjKb/weathertech_cyber_monday_specials.pdfIn PDF document text
    • https://cdn.sqhk.co/tanusulirava/fHm33Uf/borelusitesotubifitelalo.pdfIn PDF document text
    • http://gepokupaburorew.mywebcommunity.org/visabagixurovilajuz.pdfIn PDF document text
    • http://natlab.ru/convert_image_to_download_free684g3.pdfIn PDF document text
    • https://cdn.sqhk.co/xedomobedusi/Rjiiqhg/long_coffin_pink_and_white_nails.pdfIn PDF document text
    • http://sexedate69.site/you_can_go_meaning_in_hindioywiz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://7be8961d-effb-4c78-a255-78c3c9f0be09.filesusr.com/ugd/3dd68e_30874cf7569149e5a7645d39d4f39078.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/4dd963c5-de2c-48d6-8506-253a7dacb195/72154058126.pdfIn PDF document text
    • https://a3c35cc3-4a3f-4d41-ab51-8b3e4b114d30.filesusr.com/ugd/2b25b5_1dad2a83e3554507a3a6e4beec6188b0.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/b85b9d5e-dfed-45b2-aae7-e70ee3ffb04b/98021417647.pdfIn PDF document text
    • https://0491f86b-060d-4f4a-be23-b0d01488777f.filesusr.com/ugd/faa7ef_3f31eefadef44511a8b005c866cbbc09.pdf?index=trueIn PDF document text
    • https://1639490a-f715-481e-9fb1-af38d332269b.filesusr.com/ugd/a59130_dba6192a6259498f84b8aa5faf64e539.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bisapovepizaj/pokemon_shiny_gold_sigma_x.pdfIn PDF document text
    • https://s3.amazonaws.com/dazemi/lutazowogudunopirozojoros.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/12e5770c-833c-4f06-b9f3-4d18344f2ef4/59470113230.pdfIn PDF document text
    • https://s3.amazonaws.com/gimisorixosu/77575930895.pdfIn PDF document text
    • https://44f68060-d5e3-4d58-b4e7-e3760392f352.filesusr.com/ugd/49488e_98d5bdfb8e1a4d8e82409e76f643bb45.pdf?index=trueIn PDF document text
    • http://nudoritane.atwebpages.com/vixozotukoruw.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_off0000f1e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1E5 5352 bytes
SHA-256: 624a388ee17b9389aca1e5d28884f2e81b1dccf6bcfc0c4f492d59280ddbb41a
font_01_sfnt_off00010431.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10431 10536 bytes
SHA-256: d5a9f6e13290dca145e8859343cab56b070db02d83dbfe80edc0d5fafc8617e6