Malicious PDF — malware analysis report

Static analysis result for SHA-256 916586cbcc211aca…

MALICIOUS

PDF

79.7 KB Created: 2021-03-30 17:56:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: c2a6cbfa1aa60130c93dbc3fcce113f1 SHA-1: 90247acdd9211f91bc22877638d8a50c5426ae89 SHA-256: 916586cbcc211acaf39539a71c8273965dadf1a96430fb3758808e450e6fa131
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains multiple external URIs, including one that appears to be a redirector with a search term, suggesting a phishing or scam attempt. The document body, though heavily obfuscated, contains text related to 'buffalo wild wings salad nutrition information', which is likely a lure to encourage clicks on embedded links.

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://soxebez.ru/123?utm_term=buffalo+wild+wings+salad+nutrition+information PDF link annotation
    • https://cdn.sqhk.co/wifopuzuxiba/lghgFln/clock_chime_sound_effect_free.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379482/normal_5fe8605c145c6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467577/normal_605a0651938b6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485005/normal_60022217db5dc.pdfIn PDF document text
    • http://salukapebuke.iblogger.org/free_photoshop_website_templates_psd.pdfIn PDF document text
    • https://cdn.sqhk.co/dadirowuj/hIzMupF/neuron_model_diy.pdfIn PDF document text
    • https://cdn.sqhk.co/numiwuzuwix/vUiitgg/69217523324.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381737/normal_5fe4b83289a8c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422643/normal_5fed1cc3d515c.pdfIn PDF document text
    • https://cdn.sqhk.co/wetewajaba/uhbjjic/best_kung_fu_fighting_movies_list.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470828/normal_5ff95ecd58484.pdfIn PDF document text
    • https://cdn.sqhk.co/talokelom/Fghgjpb/94193914958.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376099/normal_6031305028af5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://7ae52be2-ba3c-41fb-8935-29281088223e.filesusr.com/ugd/affaa6_2e86e4994ddb4e379388a1c8acc5db34.pdf?index=trueIn PDF document text
    • http://suzusufiwavel.rf.gd/samsung_camcorder_hmx-f90_price.pdfIn PDF document text
    • http://vokerajud.epizy.com/angina_de_pecho_tratamiento_farmacologico.pdfIn PDF document text
    • https://e1318bff-d970-45e2-bcea-45481503a18b.filesusr.com/ugd/75a96d_6c5738fcf9384e8ead1f627c0844ce76.pdf?index=trueIn PDF document text
    • https://3794eb9c-cc8b-492c-aecc-44533f76aaa6.filesusr.com/ugd/1ee69b_eb760b06410d42598e7257b88d72a6ab.pdf?index=trueIn PDF document text
    • https://24218389-b518-4ca3-8548-65eaf758daa4.filesusr.com/ugd/c836c3_45868eee81f84f3a9f14d017cbde2c47.pdf?index=trueIn PDF document text
    • https://41c240d9-b4af-4f88-8fa4-2a41cce3a287.filesusr.com/ugd/01bc73_cabb7a5fbdb643dca8aad975df6f5f34.pdf?index=trueIn PDF document text
    • https://67dec473-0a9c-497c-80b1-62a4c84c5046.filesusr.com/ugd/0aab01_8c9903a5ac0148f4a96b3b7db53b58c9.pdf?index=trueIn PDF document text
    • https://625f08e2-3d8e-45b5-8e8c-b95d001c5c7c.filesusr.com/ugd/d94ae5_9e04d2a8356c471ea7aa62856cfb9bb2.pdf?index=trueIn 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_off0000f866.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF866 5368 bytes
SHA-256: 2c842ea2b956589b811ba53bd832c8dec7cb37342ffd144ece6a6c68491fbf6f
font_01_sfnt_off00010aaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AAA 11308 bytes
SHA-256: 69c3a4969133690dec74ad68c07fffdd00a2b44e30e27e9b062a6b687c85d578

Open this report in the interactive analyzer, or submit your own file for analysis.