Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec5c11d0d9e525a3…

MALICIOUS

PDF

97.1 KB Created: 2021-03-03 02:46:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 7cddffee7b0e519e5c2ad3c19c294775 SHA-1: 113e430c85e134421cfc1f9a75a3ce7fff703564 SHA-256: ec5c11d0d9e525a3edfc45f1c90d2f5ba1bee766dccdefccdfa68d43132e5909
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with a high risk score. It contains an embedded URI pointing to 'https://lozipotod.ru/strik?utm_term=best+way+to+quit+smoking+free', which is likely used to deliver a malicious payload or phish for credentials. The document body, though heavily obfuscated, contains references to 'wkhtmltopdf' and a date, suggesting it was generated programmatically to appear as a legitimate document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://lozipotod.ru/strik?utm_term=best+way+to+quit+smoking+free PDF link annotation
    • https://cdn.sqhk.co/girasufu/hgpjigj/24460492426.pdfIn PDF document text
    • http://sowopezamiw.medianewsonline.com/46248537231.pdfIn PDF document text
    • http://pixunune.sportsontheweb.net/clash_of_kings_pov_chapters.pdfIn PDF document text
    • http://rejasikega.scienceontheweb.net/how_to_sync_polk_soundbar_to_tv_remote.pdfIn PDF document text
    • http://zarabatyivat.ru/zosenikinurexakubomoty508.pdfIn PDF document text
    • https://cdn.sqhk.co/rovifatira/ijdrRD9/jamafipo.pdfIn PDF document text
    • http://chelobaka.space/how_to_program_fios_voice_remotedsfk5.pdfIn PDF document text
    • http://itdiscount.info/jepalererifewemutemafulo5f4bz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380076/normal_5ffa722502b8f.pdfIn PDF document text
    • http://bajifepeselok.sportsontheweb.net/54775753164.pdfIn PDF document text
    • http://mufutekuson.getenjoyment.net/68899215022.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zunewidimem/anguish_movie_parents_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/zunewidimem/nezutekuxudiw.pdfIn PDF document text
    • https://s3.amazonaws.com/nijudow/fakomamizabokid.pdfIn PDF document text
    • https://s3.amazonaws.com/pegozegi/vogiz.pdfIn PDF document text
    • https://s3.amazonaws.com/mexijegedakol/ravigeroralorupevuzuwinum.pdfIn PDF document text
    • https://s3.amazonaws.com/luropi/android-_file-_transfer_ubuntu_repository.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_off00013efe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13EFE 5488 bytes
SHA-256: 55781115e9fc2027735361972259b618c8031b2ebcd4b5644c9a320be02b9606
font_01_sfnt_off000151bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x151BD 11068 bytes
SHA-256: e6d05289233c0f8d18a11f38d0ecbc09eb90e1f61abe1e392333c55a0176aa1e

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