Malicious PDF — malware analysis report

Static analysis result for SHA-256 65aed02091709fb4…

MALICIOUS

PDF

73.9 KB Created: 2021-06-01 05:40:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 6aac7d9d01d589efc10a3752137e5b0c SHA-1: 6b09eae35f8f5cf6375aebcb569e51dca98e2465 SHA-256: 65aed02091709fb4ef007d487908254420d32b9049fbc30a8d6c2216563495ca
126 Risk Score

Malware Insights

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

The sample is a PDF document identified as malicious by ClamAV and an ML classifier. It contains multiple embedded URLs, with one pointing to 'allytemp.ru', suggesting a phishing or redirection attempt. The PDF's structure and the presence of external URIs indicate it's designed to lead the user to a potentially harmful external resource.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://allytemp.ru/pbw?utm_term=the+raven+poem+by+edgar+allan+poe+summary PDF link annotation
    • https://kimonasisu.weebly.com/uploads/1/3/5/4/135400987/8509866.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385021/normal_60202749aeeb1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446273/normal_6039765ec052e.pdfIn PDF document text
    • https://jejademi.weebly.com/uploads/1/3/4/2/134266227/pojufox.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391340/normal_601374c7eff48.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420025/normal_6000748642634.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459640/normal_5ffe6fe4c91af.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368735/normal_6049bc96e55ca.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445737/normal_602af4d42ce2c.pdfIn PDF document text
    • https://lutunorozepilaw.weebly.com/uploads/1/3/1/4/131438778/mixilozibiki_sarogixubobez_dunevozomev.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448357/normal_602d2b29ec8a2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403938/normal_603e26884842a.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/3f6cb617-f392-4278-bfbf-4912d5847725/section_21_firearms_act_1968_sentencing_guidelines.pdfIn PDF document text
    • http://bemulopawed.pbworks.com/f/77103687079.pdfIn PDF document text
    • http://degenazi.pbworks.com/f/how_to_change_oil_toro_personal_pace.pdfIn PDF document text
    • http://bofamawetodo.pbworks.com/f/diwilejizafalazitetobe.pdfIn PDF document text
    • http://visetululiv.pbworks.com/w/file/fetch/144415146/what_is_the_greatest_musical_performance_of_all_time.pdfIn PDF document text
    • http://xuresasadox.pbworks.com/f/meraxobes.pdfIn PDF document text
    • http://tazijebep.pbworks.com/f/77806212844.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f0301fce-a358-4844-a86b-9e1509a6b361/xesifol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/253a6c85-ec47-4a36-ae3c-6744e390eafc/jotamedo.pdfIn PDF document text
    • http://barumena.pbworks.com/w/file/fetch/144440589/free_minty_pickaxe_code_youtube.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b35370e-cb56-4e13-9578-6c493b7d4ec1/listening_test_for_grade_6_with_answers.pdfIn PDF document text
    • http://palixazoke.pbworks.com/f/neluxadutepokoxemebar.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_off0000e465.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE465 5624 bytes
SHA-256: a305e465cad7c847a703076e8b41d632b81ff38073dcd57456e381946676662c
font_01_sfnt_off0000f760.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF760 10252 bytes
SHA-256: efe83826a65b748346446901079e52300168dfc4f3b480f4b1d1c46e79ad03e3

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