Malicious PDF — malware analysis report

Static analysis result for SHA-256 8db2f061776a393e…

MALICIOUS

PDF

79.8 KB Created: 2021-05-17 10:20:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 0ec979006bcf79e27749378566b4c102 SHA-1: 248b63cf26ea57ebb1cdc43990e3da5fd771011f SHA-256: 8db2f061776a393eeecc686e37461603938400eafc2d77a33698591eea126bce
66 Risk Score

Malware Insights

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

The PDF document contains numerous links, many pointing to disposable domains, and one prominent URL that appears to be a lure for downloading Adobe Premiere Pro. The ML classifier strongly indicated maliciousness, and the PDF structure suggests it functions as a link farm designed to redirect users to potentially unwanted software or malicious sites. No scripts were extracted, but the embedded URLs are the primary indicators of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://xezojetit.ru/strik?utm_term=adobe+premiere+pro+free+trial+download+mac PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4370762/normal_606623df6ffdb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373757/normal_60075185218ec.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383924/normal_5fc9a80f3ebee.pdfIn PDF document text
    • http://bejisosubonito.sportsontheweb.net/xalebukezi.pdfIn PDF document text
    • http://zasazigupat.getenjoyment.net/ayn_rand_anthem_book.pdfIn PDF document text
    • http://poposiruta.mywebcommunity.org/96135713148.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454436/normal_5fe73320a0d7f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485176/normal_60233d80d24d0.pdfIn PDF document text
    • http://rexonina.medianewsonline.com/tadabbur_al_quran_free_download.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://ralirajuz.atwebpages.com/how_long_do_you_dehydrate_turkey_jerky.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ac537da-984d-4b9e-968b-b4c7114fe335/eddie_bauer_jogging_stroller_reviews.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d27d27f9-a229-4df3-a0e3-9c854d2dbf49/jugipufodonosunugagu.pdfIn PDF document text
    • http://nuvebabe.atwebpages.com/the_actor_s_nightmare_script.pdfIn PDF document text
    • http://wurebosuloxu.myartsonline.com/62466300365.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d2baf419-d7f6-4910-8ed5-7c39dcac3301/what_are_the_theories_of_environmental_psychology.pdfIn PDF document text
    • http://nobapizasiwe.myartsonline.com/catalogo_hinode_2020_ciclo_2.pdfIn PDF document text
    • https://40e214c1-1950-44e8-a195-e2c6eeb23253.filesusr.com/ugd/a517f4_df6752c2786e4931985dbee59f67ee28.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/85c4614c-9fcf-4915-84c5-ec4644675d1c/dunuwodulaxuvexigatorov.pdfIn PDF document text
    • https://98e80eac-0673-4bf9-a3de-4132461903b3.filesusr.com/ugd/1acd69_d917c2f79c7142cdbb5df53cda90f7aa.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/98e9a9df-9fbc-411f-a1d2-5c565eb70b74/briggs_and_stratton_725_series_ex_190cc.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_off0000fad1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAD1 5344 bytes
SHA-256: d3ddd53a099d9d73384cd5016bbc1f1bfe092ccf33f210555c7058db88c7b443
font_01_sfnt_off00010cf9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CF9 10796 bytes
SHA-256: 299c4bb6a5c28f5a2c83d7efe0b51824abaf374d29525a5689b67b5a75a45dd4

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