Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec94862566c65d41…

MALICIOUS

PDF

79.7 KB Created: 2021-03-28 14:50:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 058da1565db224ee5ba5cf98177b5ed0 SHA-1: 5ec7a9d9d1a79a793c2510eb1ad0ae60bc981d27 SHA-256: ec94862566c65d41ca96dd73df3c19dea150133db74f261ffedd2aa6e0271ad5
66 Risk Score

Malware Insights

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

The PDF file contains embedded URLs that redirect to potentially malicious domains, disguised as search results for a specific document. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the PDF is part of a link farm hosted on disposable domains, suggesting a phishing or malware distribution attempt. While no scripts were directly extracted, the PDF structure and embedded URIs are indicative of a social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 4

  • 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://zajinet.ru/award?keyword=binomial+distribution+table+n+100+pdf PDF link annotation
    • http://allostar.buzz/kewekmweda.pdfIn PDF document text
    • https://cdn.sqhk.co/litonesi/jibvEjd/befelojotanonotupife.pdfIn PDF document text
    • http://saleproducts.pro/pujetedemuzefoziwujosanorht10k.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426701/normal_6052f9cc5afce.pdfIn PDF document text
    • https://cdn.sqhk.co/pujixefan/hcXgdja/69871214631.pdfIn PDF document text
    • http://parralax.net/anime_colouring_book_onlineas94f.pdfIn PDF document text
    • https://cdn.sqhk.co/xopigotax/iejehh2/98274060463.pdfIn PDF document text
    • https://cdn.sqhk.co/naliwanik/5gjgjih/vi_apple_tree.pdfIn PDF document text
    • http://torchland.xyz/80472471599ruhpc.pdfIn PDF document text
    • http://good-production11.site/que_se_celebra_el_da_de_hoy_en_los_estados_unidos1ijmn.pdfIn PDF document text
    • http://prostotit.site/driver_hp_deskjet_9800_windows_7_32_bitsnktus.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451760/normal_5fe866b4a855b.pdfIn PDF document text
    • http://douchely.xyz/oxygen_not_included_map_seed6wbs7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478148/normal_5feb467700ebb.pdfIn PDF document text
    • http://cheapkeys.site/les_miserables_concert_2019_soundtracke7km1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382429/normal_6004c15312383.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://s3.amazonaws.com/wujapu/audio_cd_codec.pdfIn PDF document text
    • https://s3.amazonaws.com/dinigugaxej/97722289921.pdfIn PDF document text
    • https://s3.amazonaws.com/tutasujal/55235408457.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f18def3-e9e1-47f6-9842-9c596e37d427/how_many_carbs_are_in_a_soft_taco_supreme_from_taco_bell.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/73e93641-ebcb-49ab-8a67-192995050651/86667908038.pdfIn PDF document text
    • https://s3.amazonaws.com/wupagivoz/upload_doc_to_wix_website.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_off0000eabb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEABB 5452 bytes
SHA-256: efeffcd2ad884a142d74c59eca230641df1b42e341db57751905d063fbd07ac4
font_01_sfnt_off0000fd18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD18 11084 bytes
SHA-256: 42c5b7da3fcc3f360f5a481db605c95d751bbef928b3becd8ca220fe2f0cf151
font_02_sfnt_off0001232e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1232E 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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