Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0e5b18afe3af008…

MALICIOUS

PDF

72.3 KB Created: 2021-03-17 11:14:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 33d4709adabaa86f2df7ed7646d284a5 SHA-1: 23905e8043ebe81f0569940a20923f877d9f98cc SHA-256: c0e5b18afe3af008a2aea10b8b7f6cace59fbde1080b6faabbb115ed915361be
126 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, with one specifically identified as a link farm on disposable hosting, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded links are characteristic of social engineering lures designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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=basketball+court+diagram+pdf+printable PDF link annotation
    • http://mscgis.net/detobi8kyyb.pdfIn PDF document text
    • http://mainsale.info/wuwiragijesazuesnn.pdfIn PDF document text
    • http://fisukebisogovi.22web.org/rufuwugugekide.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483081/normal_6017f76e660b5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377109/normal_600c708e92eec.pdfIn PDF document text
    • http://vomenelavive.22web.org/gilolelowozevesemuwiw.pdfIn PDF document text
    • http://egosikenclub.com/jvc_kd-sr40_usb_cannot_playta3fd.pdfIn PDF document text
    • http://littlenat.space/gafenakilirovakotexab1hwm.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501775/normal_60055a78e8f53.pdfIn PDF document text
    • http://sitizinudex.getenjoyment.net/good_things_come_to_those_who_wait_on_the_lord_bible_verse.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408461/normal_60356986c0fcb.pdfIn PDF document text
    • http://wavapivanuf.scienceontheweb.net/togorutugikeju.pdfIn PDF document text
    • http://praktika-ingenieur.com/piwanoligexoxy67.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://0ea28b16-58c2-472d-b6be-3e97fe9b7bb6.filesusr.com/ugd/696b8a_48e311e8b4d447028fe02703f3eaed6f.pdf?index=trueIn PDF document text
    • http://zaxuzut.atwebpages.com/61730480105.pdfIn PDF document text
    • https://94db4134-5784-44c5-a63d-963e509970fa.filesusr.com/ugd/9c58c5_6a78f7c7728d4faaa55e6c7ca96eb619.pdf?index=trueIn PDF document text
    • http://najaxobefirag.epizy.com/choomantar_audio_song.pdfIn PDF document text
    • https://e53c8fcc-339b-4d8f-83f6-44ddc8c6ace4.filesusr.com/ugd/1ea9c4_efce518c975d4f72bab3b8dd5e590ab6.pdf?index=trueIn PDF document text
    • http://tosopipates.epizy.com/27300520262.pdfIn PDF document text
    • https://da89e6ec-52f9-4c28-8de8-447a2e923c0c.filesusr.com/ugd/5e5b2a_de0a46cff582403bb36012bed1b1de48.pdf?index=trueIn PDF document text
    • https://f608bf75-187c-4b28-9621-af925c05c2b6.filesusr.com/ugd/05e3ad_fd75211b0d57423c8308ab151b66a1d5.pdf?index=trueIn PDF document text
    • http://pexitiwe.epizy.com/cause_and_effect_worksheets_for_third_graders.pdfIn PDF document text
    • https://a86a6b26-b473-4b55-b9aa-7628a2bff077.filesusr.com/ugd/4f270c_452d209db5a441b188644178df93d0ff.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_off0000da56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA56 5728 bytes
SHA-256: 8befedba54220119fbd92458c665e7d008b8a73daee6e2e8372def47ebd8e33a
font_01_sfnt_off0000edbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDBB 10556 bytes
SHA-256: 63112b4552afd40151b607c078fec75e9ada3c12c356c2cf4125dfc6f1acfc0f

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