Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b34aff7b142d2df…

MALICIOUS

PDF

82.9 KB Created: 2021-04-19 07:05:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: d4498f260a49512d8a4495bb80ae5e69 SHA-1: a30105ab1641d7dd5f3d5ead470de337d276941a SHA-256: 0b34aff7b142d2df75b6e1f5362961206dfeabc98bc013893474bb8e8385b556
126 Risk Score

Malware Insights

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

The PDF contains numerous external URIs, many hosted on disposable domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and URI patterns are consistent with techniques used to redirect users to malicious sites, potentially for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://ponafet.ru/strik?utm_term=is+corian+cheaper+than+granite PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4486566/normal_601a0f4ac09f4.pdfIn PDF document text
    • http://sevowina.medianewsonline.com/canada_peru_free_trade_agreement.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445534/normal_5ffd98ba29a4d.pdfIn PDF document text
    • http://wapadax.scienceontheweb.net/amazing_grace_easy_piano_sheet.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365545/normal_6066262a038a4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365599/normal_603bb0a87e3b7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417141/normal_60141cd621d11.pdfIn PDF document text
    • http://xufamorazogubov.sportsontheweb.net/2020_maserati_granturismo_mc_price.pdfIn PDF document text
    • http://xejepurefe.scienceontheweb.net/surefigebofivijedil.pdfIn PDF document text
    • http://fejavodexata.getenjoyment.net/ba_1st_year_maths_book_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368223/normal_6010b1c5180cf.pdfIn PDF document text
    • http://nasufulorejuwe.mywebcommunity.org/burger_king_august_2020.pdfIn PDF document text
    • http://zozitaze.mypressonline.com/conducting_an_interview.pdfIn PDF document text
    • http://jexekiraj.sportsontheweb.net/stock_market_books_in_kannada.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/minabiwa/nalunowuwewipeku.pdfIn PDF document text
    • https://s3.amazonaws.com/zumomasugipeno/low_cost_hearing_aid_project_report.pdfIn PDF document text
    • https://s3.amazonaws.com/zufaxepixiguxax/xukupinupumurevevefutade.pdfIn PDF document text
    • https://s3.amazonaws.com/jodabiladezot/52662783098.pdfIn PDF document text
    • http://jimarol.myartsonline.com/bosch_router_1617evspk_manual.pdfIn PDF document text
    • http://lugenizuridaj.atwebpages.com/degoxojibeluzipejod.pdfIn PDF document text
    • http://benamow.myartsonline.com/mitijojeveru.pdfIn PDF document text
    • http://noratev.myartsonline.com/translate_arabic_document_to_english.pdfIn PDF document text
    • https://s3.amazonaws.com/fusidejebi/32915303121.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_off000107b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107B5 5100 bytes
SHA-256: f8db0ce86f450dbc590637f1c8e4934273620832506313c1e78159b9c704d818
font_01_sfnt_off0001190a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1190A 10812 bytes
SHA-256: 4977334e952bed63c1d19ab48c56326f7b8743258bdb1e15b8603c2dfe208764

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