Malicious PDF — malware analysis report

Static analysis result for SHA-256 d190a7ae99ba9b9a…

MALICIOUS

PDF

75.5 KB Created: 2021-03-09 22:05:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 47e85d94b088f936377192f0351e3d94 SHA-1: f09cc72f1b3931084bae0946627c0fd538544061 SHA-256: d190a7ae99ba9b9afbd134b1d50b3449c6cdadf6f4e3d4b22a2e4fc349f755b0
66 Risk Score

Malware Insights

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

The sample is a PDF file that contains numerous external URIs, many of which point to disposable hosting and link farm patterns, indicating a malicious intent to redirect users. The ML classifier strongly flagged this PDF as malicious. While no scripts were directly extracted, the PDF structure and embedded URLs suggest it's designed to lead users to potentially harmful websites, likely as part of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://gimoguvi.ru/award?keyword=agitator+design+pdf PDF link annotation
    • https://vevatujiv.weebly.com/uploads/1/3/1/4/131482893/a4b6bc3dfee1.pdfIn PDF document text
    • https://cdn.sqhk.co/lokutibu/VFhbNCR/microsoft_teams_video_conference_breakout_rooms.pdfIn PDF document text
    • https://cdn.sqhk.co/tusufawenu/jfajgjd/murder_mystery_apple_game.pdfIn PDF document text
    • http://3-bureaureport.info/cloud_atlas_book_or_moviead0tw.pdfIn PDF document text
    • https://cdn.sqhk.co/wetaxawirewu/Pmgifpe/whatsapp_business_api_chatbot.pdfIn PDF document text
    • http://bet-info.ru/satovebebazojiravipoirgf.pdfIn PDF document text
    • http://1s.london/68136806980p1ggk.pdfIn PDF document text
    • https://koxowuberes.weebly.com/uploads/1/3/1/3/131379375/4280015.pdfIn PDF document text
    • http://tejidirexe.mywebcommunity.org/gegog.pdfIn PDF document text
    • http://natural-shop.info/asphyxia_co_shu_nie_piano_sheetpxz1q.pdfIn PDF document text
    • http://yogait.space/birthday_wishes_songyyv9h.pdfIn PDF document text
    • https://cdn.sqhk.co/tiwoxebu/ehgjiih/pezupuwiranopisumudum.pdfIn PDF document text
    • http://poradoit1.site/79180456905pp6g6.pdfIn PDF document text
    • http://smartycredit.info/anti_spy_app_android_kostenlos4n94i.pdfIn PDF document text
    • https://jenisevemib.weebly.com/uploads/1/3/1/0/131070602/devip_ninewixidux_zososutijigovir_bufokunagugas.pdfIn PDF document text
    • http://esagafow.fun/tovogiger7gqik.pdfIn PDF document text
    • https://zoxiniguve.weebly.com/uploads/1/3/4/5/134584112/4950653.pdfIn PDF document text
    • http://zomaragexavope.sportsontheweb.net/peugeot_103_sport_prix_neuf_maroc.pdfIn PDF document text
    • http://opssmall.space/file_from_blob_storage_javat8g45.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://601bead5-a720-4f65-98db-62fe2a42cb91.filesusr.com/ugd/0e52b4_b725730a0264485983055c9e8cf05925.pdf?index=trueIn PDF document text
    • https://599b09cd-7b6a-4758-94a3-08a08d316165.filesusr.com/ugd/628a76_3eaeaf920d5443da88620bd1e8ef29ba.pdf?index=trueIn 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_off0000e91f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE91F 5164 bytes
SHA-256: 158b771393055b7c1e2000ccb78612c35bdb37645a85b879e57f9a25ae4395f3
font_01_sfnt_off0000fac3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAC3 11056 bytes
SHA-256: 1a956dcef4572195b47e9cf0fc8dbd489bc825932c9144a2f9f0820c87a2989e

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