Malicious PDF — malware analysis report

Static analysis result for SHA-256 92f7a12f48908ff6…

MALICIOUS

PDF

90.4 KB Created: 2021-04-08 20:05:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 222d7728597e0ce3cae16fea33ccf715 SHA-1: d6babddab010a5dbb83a7df7fe578240b15f02f3 SHA-256: 92f7a12f48908ff6f70c9595eb07030e2a417244b2bd81e129e6485bfd9a3d40
66 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs pointing to disposable domains, masquerading as legitimate files like 'drum lesson books pdf'. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a deliberate attempt to create a link farm on potentially malicious or disposable hosting. While no scripts were explicitly extracted, the presence of external URIs and the ML classifier's high confidence suggest malicious intent, likely to redirect users to phishing or malware distribution sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://nipisod.ru/strik?utm_term=drum+lesson+books+pdf PDF link annotation
    • http://pinopizo.sportsontheweb.net/20876865609.pdfIn PDF document text
    • https://bufopajej.weebly.com/uploads/1/3/5/9/135956722/rutolorop.pdfIn PDF document text
    • https://forijadezututeg.weebly.com/uploads/1/3/0/8/130813765/kamovaruvu.pdfIn PDF document text
    • http://faxusupovetek.sportsontheweb.net/93159330182.pdfIn PDF document text
    • https://cdn.sqhk.co/xeposetuge/bgcVSOA/wutuj.pdfIn PDF document text
    • http://finuxezanasa.mygamesonline.org/bridge_to_terabithia_chapter_questions_and_answers.pdfIn PDF document text
    • https://nunavupogo.weebly.com/uploads/1/3/4/4/134471291/walemolasufadafod.pdfIn PDF document text
    • https://cdn.sqhk.co/luwukamuku/xfgfmTl/pop_smoke_top_10_songs.pdfIn PDF document text
    • https://cdn.sqhk.co/kimamena/VYaqQi6/mokobatotajototowobomuka.pdfIn PDF document text
    • https://sakedupepig.weebly.com/uploads/1/3/4/3/134355988/9308481.pdfIn PDF document text
    • http://xasekijig.mypressonline.com/kekurolebafadajujoz.pdfIn PDF document text
    • https://cdn.sqhk.co/logubaxe/hhhcHC3/monkey_go_happy_four_worlds_4_game.pdfIn PDF document text
    • https://cdn.sqhk.co/gugapedulob/jjgUqie/wejopaxepubez.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b6a5bcf-de0c-47f9-84b1-1ea73da6e80f/19394406896.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b7825549-26af-44ae-896a-7f137ee326e4/attack_on_titan_season_3_characters_names.pdfIn PDF document text
    • https://s3.amazonaws.com/tiduro/31957881692.pdfIn PDF document text
    • https://s3.amazonaws.com/zijivevip/finite_element_method_books.pdfIn PDF document text
    • https://s3.amazonaws.com/xukanomarexumu/ccna_exam_sample_questions.pdfIn PDF document text
    • https://f85e9a30-dbb9-40fd-a66d-53bd7daafe07.filesusr.com/ugd/1b9faa_a09fa88fb6834e69b4bd7491c4d283f0.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/71406db4-f47a-4394-b647-7d6f46655775/romeo_and_juliet_act_1_scene_5_script_summary.pdfIn PDF document text
    • http://jitawidavez.atwebpages.com/kejegitodajadalenefezipi.pdfIn PDF document text
    • https://737bf953-b780-43bc-8af0-312ed5328a40.filesusr.com/ugd/017c44_8ab0bd309ebe4a1bae8c762399c1fbfa.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/70e57fe0-d207-4e86-b1ce-1ede666fc570/lisofilodubewazabipoduv.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_off000125e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125E2 5180 bytes
SHA-256: b387516b7c5524e1fc953fa99e92ebab2d2d8bd115d525a046804c12c42f298a
font_01_sfnt_off0001376e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1376E 10728 bytes
SHA-256: f69cf2ce2fe464419fd083906b61b53ab84b48bbe3a2e0ef4648cf42f30b578a