Malicious PDF — malware analysis report

Static analysis result for SHA-256 18d41495056abf59…

MALICIOUS

PDF

74.0 KB Created: 2020-12-18 13:41:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 5fd5c839747d249106415edda20fccb0 SHA-1: ee633814cdbb89e130289aad2907feb042c69986 SHA-256: 18d41495056abf59b017ae44dddad64e8c86fca477ff091b07ba443030f196aa
222 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one identified as a malicious redirector. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' and 'PDF_SEO_LINK_FARM' indicate a high likelihood of malicious intent. The presence of a 'SE_DOWNLOAD_BUTTON' heuristic further supports a lure-based attack pattern. Although no scripts were extracted, the PDF structure and linked URLs strongly suggest it's designed to redirect users to malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://traffking.ru/aws?utm_term=anime+cloud+pro+apk In PDF document text
    • https://pajenugemin.weebly.com/uploads/1/3/4/6/134677616/6902d.pdfIn PDF document text
    • https://negotibuveno.weebly.com/uploads/1/3/4/7/134733978/8036524.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/seriposuj/vexirudukepisuvifidopi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4df88d0f-234e-4795-90d5-0cd094aeb574/terimuj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0e016c23-f737-4511-b93a-3982b2e462ba/7130905000.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fcdf4752c00fb19414e5faf/t/5fd62bb5034a586a4f3c8006/1607871418272/fuzimipedawuvujob.pdfIn PDF document text
    • https://s3.amazonaws.com/nuxulikiwab/frost_sullivan_report.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf9f4b4d-f616-4241-91eb-c243057c68a0/snow_white_cake_recipe.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0e70d1452f90b7fe56088/t/5fc39aab3f75b16643430aa6/1606654636498/vojopexedajotodevaxizu.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd26b15b546e47908791f0/1606231731388/70082098352.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe3b7dbc819f1cf4a415a9/1606302590574/at_a_certain_time_during_the_titration_the_rate_of_appearance_of_o2.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc294ce7848ba205d234ec5/t/5fcdcd9afe657040d5b2d0d8/1607323034058/frito_lay_sales_management_associate_salary.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0ec6c8787e879896c16ae/t/5fc23280f3de5e49b5add9d1/1606562438664/nesume.pdfIn PDF document text
    • https://s3.amazonaws.com/jonora/kaththi_sandai_tamil_movie_free.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cd03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD03 5096 bytes
SHA-256: 2f410cccf29ad82428c6188c49ba7c4ef16e40c98b0f50d99bde6010ffa286c3
font_01_sfnt_off0000de3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE3F 12056 bytes
SHA-256: dd3eca1f222aa779c1654a250ff6740509b3c798aac411a8f9eda0c79abc38f9
font_02_sfnt_off00010610.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10610 16200 bytes
SHA-256: b3d95354fc80a361dd48af21ae6ea2e9afed99d85c2a3657ec3a7d3405962d9f

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