Malicious PDF — malware analysis report

Static analysis result for SHA-256 dfca0a9361e3e9d6…

MALICIOUS

PDF

81.9 KB Created: 2021-05-24 03:00:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 8816bee319fa72a9da6ce07e45a7522d SHA-1: 2ea6ac700dcca9ad5baaa4b1cbf328753008568a SHA-256: dfca0a9361e3e9d635a2d31deea2112fd3d8bdef343909f5ead47b47d1146b76
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, identified as a link farm, with one prominent URL pointing to a site offering 'Premiere Pro CS6 download'. This strongly suggests a phishing or malware distribution attempt disguised as software piracy. ClamAV and ML classifiers also flagged this PDF as malicious, likely due to its content and structure designed to redirect users to potentially harmful sites.

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://gimoguvi.ru/strik?utm_term=premiere+pro+cs6+download PDF link annotation
    • https://bexoligimes.weebly.com/uploads/1/3/4/3/134314561/4978993.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368977/normal_6055ad1a343f1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483837/normal_5fd99150d949d.pdfIn PDF document text
    • https://mepanomelisegil.weebly.com/uploads/1/3/4/8/134899905/nonebow_mewewidubuniza_paxex.pdfIn PDF document text
    • https://genamimiwovem.weebly.com/uploads/1/3/1/6/131636881/902771893ed8596.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414353/normal_6046e4daa8d0d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479254/normal_6013b917e70d2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4456116/normal_5ffe9a38b6e42.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470683/normal_5fcb09bc67bbe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381102/normal_5fc7584c50538.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/efce870d-1694-46a0-b754-e8281a11a39e/mechanical_engineering_salary_uk_2019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c352d1a-0e7d-4c5e-9fbb-4b4825fab9b0/auld_lang_syne_sex_and_the_city_mairi_campbell_lyrics.pdfIn PDF document text
    • https://s3.amazonaws.com/tosego/seramedutageselisuku.pdfIn PDF document text
    • https://s3.amazonaws.com/fibesezati/film_boboho_2018_subtitle_indonesia.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/62247109-8b89-4cc7-a7fa-04b5037704e4/abnormal_psychology_an_integrative_approach_8th_edition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3bfbebe9-091b-49db-ba63-8fb914f6f1cf/ximonopi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b7e9159c-4d8b-4325-84e9-96c06d933f11/6108645166.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/98f45efc-89d6-463b-ba96-f60893ac881a/rorufil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/001b7c4c-5875-4162-9abd-1ae356a1b035/whats_the_best_delay_pedal_for_guitar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c8416fd-0c72-4303-b445-7fa8867d1a4f/zapaleti.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/09c151b6-02c9-481d-be81-c87864d41d97/black_and_decker_leaf_hog_240_mph_blower_vac.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_off0000fe50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE50 5468 bytes
SHA-256: 96571298bfe50fcf042391b77f61b945df8e298b35394b5ac1b84f8c19ed86f3
font_01_sfnt_off000110df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110DF 12180 bytes
SHA-256: f4d95d9f71180dd2ad9afa255498ef49a21427cf66b27b6036922f516411d27c

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