Malicious PDF — malware analysis report

Static analysis result for SHA-256 39ec58cdf2dc4edf…

MALICIOUS

PDF

72.5 KB Created: 2021-04-07 02:16:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: ecb7be4859c5961fdd73f05c53c78110 SHA-1: 2119d32ed067beec346b5b9177f3d1b3ce7f185d SHA-256: 39ec58cdf2dc4edf460f7822901a2c2000e7fbcca1c02ec1c68a9d2e063a4a4d
126 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs pointing to disposable domains, suggesting a link farm or phishing lure. The PDF structure and embedded URIs are consistent with attempts to redirect users to potentially harmful websites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://jacksth.ru/award?keyword=french+english+bilingual+visual+dictionary+pdf+free PDF link annotation
    • http://lnstagram-helping-centre.com/stata_ado_file_location0ff01.pdfIn PDF document text
    • http://xxlmature.site/up_married_life_pianoq9alt.pdfIn PDF document text
    • http://kufafukedexepix.mygamesonline.org/nubolowesuki.pdfIn PDF document text
    • http://mufosubofamar.mywebcommunity.org/76014448056.pdfIn PDF document text
    • http://housefashion.ru/fivoziwobisikaa6ax.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408718/normal_5ff3b74e8eeac.pdfIn PDF document text
    • http://pedrons.space/viwafalonorifuzinukedima8t8hm.pdfIn PDF document text
    • http://lowwsaw.xyz/burger_king_menu_specialsm2wiw.pdfIn PDF document text
    • http://nutosuvitiraj.scienceontheweb.net/how_many_batteries_in_apc_smart_ups_3000.pdfIn PDF document text
    • http://allostar.buzz/certainteed_shingle_warranty_informationt6684.pdfIn PDF document text
    • http://riwotivadejud.sportsontheweb.net/blue_book_value_of_my_car_australia.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486534/normal_602452ba54918.pdfIn PDF document text
    • https://rerararomimin.weebly.com/uploads/1/3/1/3/131383042/bipuxelevufisij_nazaronoworal.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4498801/normal_604b68d1d96b5.pdfIn PDF document text
    • http://euroshopme.site/how_to_measure_effectiveness_in_research76z8r.pdfIn PDF document text
    • http://idealica-ufficiale.site/32_questions_to_make_someone_fall_in_love_with_youpc1ny.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451210/normal_601f41056d958.pdfIn PDF document text
    • https://supenavasude.weebly.com/uploads/1/3/5/3/135397397/vipegexedabaxapisofa.pdfIn PDF document text
    • http://robolab.one/peraroly3dcc.pdfIn PDF document text
    • http://whitetwo.space/verolcjtna.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424682/normal_5fcda219cd9a4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sitafefisoju.atwebpages.com/71932759487.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_off0000dd69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD69 5672 bytes
SHA-256: 704b5c265e2fd9f7388c51b8013ee01ef8565c8331fd01b2d024b130bffae628
font_01_sfnt_off0000f0bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0BF 10412 bytes
SHA-256: 513958786c6ed03499df9df6b29223f67bbebc80fe2fd688233026647bb2e537

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