Malicious PDF — malware analysis report

Static analysis result for SHA-256 218cc6b2f8b6a912…

MALICIOUS

PDF

65.1 KB Created: 2020-12-23 16:14:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: f719302a880458174ca7360572102a80 SHA-1: 1d74269393685324044dfb77471c427dc88a74de SHA-256: 218cc6b2f8b6a912097c3e57efb5215e218d2451676c98d691ffa0fa6d568b12
214 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics, including a critical alert for linking to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text related to search terms, and the embedded links point to domains associated with malicious activity. The primary attack pattern involves directing users to potentially harmful external websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://gettraff.ru/123?utm_term=super+mario+64+ds+rom+vimm%2527s+lair In PDF document text
    • https://static.s123-cdn-static.com/uploads/4487184/normal_5fcf03934a8ea.pdfIn PDF document text
    • https://cdn.sqhk.co/biziduwime/Ciar2kw/can_you_repost_instagram_stories_with_music.pdfIn PDF document text
    • https://pakovabe.weebly.com/uploads/1/3/4/4/134442852/xonogekaju_xejazafe.pdfIn PDF document text
    • https://vidimepimexuja.weebly.com/uploads/1/3/4/6/134626803/rinamunijugeperek.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378386/normal_5fd267b2f2394.pdfIn PDF document text
    • https://xutativapejan.weebly.com/uploads/1/3/4/5/134521393/togetewaj_taligukex.pdfIn PDF document text
    • https://cdn.sqhk.co/fakobijo/gNhcjfS/anime_manga_boy_wallpaper.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/aed7244a-4cc5-49f1-aca9-b3abd75562af/vivint_cancellation_policy.pdfIn PDF document text
    • https://s3.amazonaws.com/tadovu/durusanukezof.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4aead590-e8a9-4c5a-9b5c-84116562753e/16626751929.pdfIn PDF document text
    • https://s3.amazonaws.com/sojuravewi/influenza_vaccine_cdc_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/zepifudoxapo/56218325930.pdfIn PDF document text
    • https://s3.amazonaws.com/vufupu/36213380919.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/48cf76c6-227a-473f-a458-4f0aee0896c7/28345587794.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_off0000be35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE35 5544 bytes
SHA-256: 811dd45803cf1768d238aa9f487ccaf7c376aab06af4477611204510d5aad29e
font_01_sfnt_off0000d106.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD106 11476 bytes
SHA-256: 653563552bb9e2ae3acba4d414d074799557977cd3f1771a4305494522b5267f

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