Malicious PDF — malware analysis report

Static analysis result for SHA-256 0550effab512a148…

MALICIOUS

PDF

76.9 KB Created: 2021-04-05 01:53:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 5ccba0fc3388b15fcee06a5abedbb089 SHA-1: 7c64fc31a386f6a954e23a51ab4477fc70d57284 SHA-256: 0550effab512a148140d03d56d2d9eb2c7b6ca60218a886e37de34b097cb93b3
66 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF document contains an embedded URL that redirects to a link farm, suggesting a phishing or scam attempt. The ML classifier strongly indicated maliciousness. The document body, though heavily obfuscated, appears to contain search-related terms, aligning with the lure of a search result. No scripts were extracted, but the PDF structure itself facilitated the redirection.

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://seumenha.ru/strik?utm_term=which+keurig+can+you+use+own+coffee PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4417418/normal_605fa635ae9e6.pdfIn PDF document text
    • http://wirajamosilun.22web.org/57304585289.pdfIn PDF document text
    • http://lanujozawodu.sportsontheweb.net/galivubolutowunezefavan.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401691/normal_6012583412b8e.pdfIn PDF document text
    • http://biniwitovo.mywebcommunity.org/bogiledetapajusukaf.pdfIn PDF document text
    • http://vosojivaru.mypressonline.com/41381043674.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/27c0e783-aed3-46dd-92eb-420854b956e8/44541823983.pdfIn PDF document text
    • https://0e818273-c791-4c7a-b20f-750474b78fe4.filesusr.com/ugd/362633_506e39e539d74b7099d7e1f2bbf4e508.pdf?index=trueIn PDF document text
    • http://sikejilewiz.epizy.com/sample_agreement_form_for_loan.pdfIn PDF document text
    • http://jafafikano.epizy.com/zaneruwovavu.pdfIn PDF document text
    • http://mojelol.epizy.com/fafebegujusube.pdfIn PDF document text
    • http://bikemeno.rf.gd/prepositions_of_place_exercises_perfect_english_grammar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/00aa9db4-e675-4d43-b6a1-e39aece6bd7c/xolilez.pdfIn PDF document text
    • http://zigevunagenape.epizy.com/givawedawalipopifujusuf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/96694de9-aaea-4079-a904-3e7e00bb27b3/how_to_calm_someone_down_who_is_stressed_over_text.pdfIn PDF document text
    • http://junanigemos.epizy.com/coronary_angiogram_procedure.pdfIn PDF document text
    • http://fugufaza.myartsonline.com/makalah_metabolisme_lemak.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/36bafdf1-8888-452c-8550-d26e2aa66671/new_tom_clancy_games_2019.pdfIn PDF document text
    • https://87da31d5-d184-45e7-a456-0ad082c8bd65.filesusr.com/ugd/55e94a_edb0fd2c36c247c9ba1850a0cf023900.pdf?index=trueIn PDF document text
    • http://vulaxojanomu.rf.gd/7632525485.pdfIn PDF document text
    • http://tabojiterakan.rf.gd/41284456693.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b23a2e76-7259-4cb6-b7b0-212b75aefa08/mupakebalebedexivorod.pdfIn PDF document text
    • http://puligop.epizy.com/modeling_linear_inequalities_worksheet.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_off0000ee1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE1A 5384 bytes
SHA-256: 97c24bb0f38df2b05f817c9e492f5253ce18a8727f374ad7d222b934a0c4b8b2
font_01_sfnt_off0001008c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1008C 10952 bytes
SHA-256: 2bcc638735df2f62f3417501beb8a06bd21e2442be1f9e6da1c3718de8cd9be2

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