Malicious PDF — malware analysis report

Static analysis result for SHA-256 d70b79ad34bbdb01…

MALICIOUS

PDF

77.5 KB Created: 2021-03-19 09:01:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: aa9160a4e56f0f1b4e201da021419694 SHA-1: 5f22fb80b43549cd6d46e965a8425ef1d0f60181 SHA-256: d70b79ad34bbdb012bbcf865fd0813bdd38a78635d2fd24175a0889d8294d7e4
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan' and an ML classifier indicating maliciousness. The presence of numerous embedded URLs, many pointing to disposable hosting and employing UTM parameters, strongly suggests a phishing or link-farming attempt. The document body, though heavily obfuscated, contains metadata related to its creation, further supporting its nature as a potentially malicious artifact.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://pelibifir.ru/aws?utm_term=what+are+some+examples+of+figurative+language+in+romeo+and+juliet PDF link annotation
    • http://dovogonusiru.iblogger.org/sennheiser_ew_300_g3_microphone_price.pdfIn PDF document text
    • http://nebemor.mywebcommunity.org/16468864230.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501794/normal_5feb8c41a7661.pdfIn PDF document text
    • http://kuwofadenokul.iblogger.org/malaxitalisimusaroda.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463560/normal_5fd154b776e0d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4498978/normal_600f3c4a2585c.pdfIn PDF document text
    • http://gajaxujifusokul.mygamesonline.org/83639671795.pdfIn PDF document text
    • http://womizepivilora.sportsontheweb.net/tuliranixorapafapusuz.pdfIn PDF document text
    • http://ragofilud.medianewsonline.com/american_gods_script.pdfIn PDF document text
    • http://talebakela.iblogger.org/s_works_tarmac_sl4_size_guide.pdfIn PDF document text
    • http://nosumiva.mywebcommunity.org/the_book_of_abramelin_the_mage_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404299/normal_60361af3069b0.pdfIn PDF document text
    • http://nubebukexowi.66ghz.com/gekanovafode.pdfIn PDF document text
    • http://xulubapatoso.scienceontheweb.net/how_to_improve_reading_comprehension_skills_for_adults.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426944/normal_603319adf2b56.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://ligekasuxube.onlinewebshop.net/escala_de_braden_q_para_pediatria.pdfIn PDF document text
    • http://vawirir.atwebpages.com/5985792597.pdfIn PDF document text
    • https://a1359116-1358-4cde-afc5-3600b4bb50db.filesusr.com/ugd/3b0c81_6f501cc730ed4876a9c864e0d1baba2a.pdf?index=trueIn PDF document text
    • https://cee4a208-09ac-40e0-983f-4c2cc776acbe.filesusr.com/ugd/5ed537_2137e14923384733b58fa796e70f756b.pdf?index=trueIn PDF document text
    • http://zubaxajetalomu.rf.gd/durga_saptashati_marathi_book.pdfIn PDF document text
    • https://88bec3ce-9cdd-4818-a95b-bcf8ac49d1e7.filesusr.com/ugd/72df48_84fc6783c37e4859a9cfd002ff3ee953.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_off0000f016.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF016 5672 bytes
SHA-256: 24a7deca7ffe05f3f9261f9919a7a498e7b2523c8acfabeb47ebdfa41f0befe2
font_01_sfnt_off00010354.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10354 10836 bytes
SHA-256: 4966fcdc80747906fde77c8d5a5cdf754b6e3fbffb89861f2d48235c5dd46d05

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