Malicious PDF — malware analysis report

Static analysis result for SHA-256 82d296af338e6428…

MALICIOUS

PDF

82.4 KB Created: 2021-02-19 16:46:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: cb477e293ea18b9d10302654eccc239e SHA-1: f31e61ca446fb17519956fc78e044db4de05a598 SHA-256: 82d296af338e6428a4adcc68ed4eaf8f305b33bc4e3096b199b0a48920c6445e
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a significant number of external links, many pointing to S3 buckets and Weebly domains, suggesting a link farm or SEO abuse tactic. The primary malicious URL identified is 'https://leonvi.ru/123?utm_term=prove+nor+is+universal+gate'. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution.

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://leonvi.ru/123?utm_term=prove+nor+is+universal+gate PDF link annotation
    • https://pojoguteguv.weebly.com/uploads/1/3/5/9/135996175/437579.pdfIn PDF document text
    • https://xejapekedom.weebly.com/uploads/1/3/4/8/134864907/117445b89c1d.pdfIn PDF document text
    • https://nonibebufixaz.weebly.com/uploads/1/3/2/6/132682934/wineliwe.pdfIn PDF document text
    • https://cdn.sqhk.co/tememagitapo/Sghb7Ck/share_chat_malayalam_video_status_2020.pdfIn PDF document text
    • https://kitawusew.weebly.com/uploads/1/3/4/2/134234725/motumit-kotivitexawa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454051/normal_5fdfc38db19f4.pdfIn PDF document text
    • https://cdn.sqhk.co/wusezofetib/hhXhdKc/zombies_2_werewolves_names_in_movie.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478961/normal_6017a399972e0.pdfIn PDF document text
    • https://cdn.sqhk.co/pezolaje/uhehgzH/42974232128.pdfIn PDF document text
    • https://cdn.sqhk.co/xumesapaxoku/dhaKljh/lizesuli.pdfIn PDF document text
    • https://cdn.sqhk.co/wazafanez/oghbz7e/maserati_quattroporte_for_sale_los_angeles.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/bisute/70082632520.pdfIn PDF document text
    • https://s3.amazonaws.com/benubapopikaj/xamezeked.pdfIn PDF document text
    • https://s3.amazonaws.com/jimugivos/fuketonomezuvup.pdfIn PDF document text
    • https://s3.amazonaws.com/vatakefojunib/apple_service_diagnostic_3s144.pdfIn PDF document text
    • https://s3.amazonaws.com/zabevog/calibre_free_windows.pdfIn PDF document text
    • https://s3.amazonaws.com/muvojugejoxip/heart_shaped_balloon_images_free.pdfIn PDF document text
    • https://s3.amazonaws.com/gekixadonuru/mandarin_dragonet_care_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/rokuwapesu/food_diary_symptom_tracker_template.pdfIn PDF document text
    • https://s3.amazonaws.com/diwitapezu/java_programming_books_for_beginners.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e16b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE16B 4796 bytes
SHA-256: 84f01980d453ef63ea3ff9c2e8ea6353b8f8a101b1aa795c24c03578af417143
font_01_sfnt_off0000f1c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1C7 11808 bytes
SHA-256: 10a9d1d023686c51cd9246dcea6c20a60b18065771dcda3413346d623a1f0d37
font_02_sfnt_off000118ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118BA 16060 bytes
SHA-256: ae97ebdbf5cb6679ee3ae7f6f8963da9ec2437ada1f672a33085bc8cbe806833
font_03_sfnt_off00012d4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D4E 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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