Malicious PDF — malware analysis report

Static analysis result for SHA-256 47a351a893739050…

MALICIOUS

PDF

73.6 KB Created: 2021-05-23 04:25:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 0ce1389a251703d445494b52395dc10a SHA-1: 45c4bc16158f316198cd913666c08596efff709d SHA-256: 47a351a893739050c8f1a76fc077798ab87e26c8ad96211baeaa278a22425bd1
214 Risk Score

Malware Insights

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

This PDF file contains numerous embedded links, with at least one identified as a malicious redirector. The heuristic firings indicate the document is designed to host a link farm, likely to direct users to malicious or phishing content. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest an attempt to lure users to external, potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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://crophysi.ru/wb?keyword=4%20pics%201%20word%20level%202680 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4451377/normal_6023ff82a3c1e.pdfIn PDF document text
    • https://norulekilaj.weebly.com/uploads/1/3/4/7/134712763/2507814.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390661/normal_605a9debea66c.pdfIn PDF document text
    • https://rulakufip.weebly.com/uploads/1/3/4/4/134489053/jitapidotiv-levavaz.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/744cd2cf-0bf2-444b-887c-a50d78b21e4f/70965945100.pdfIn PDF document text
    • https://s3.amazonaws.com/xoferuzu/google_sheets_for_pc.pdfIn PDF document text
    • https://s3.amazonaws.com/libusamagowuvo/81908588016.pdfIn PDF document text
    • https://s3.amazonaws.com/panalipolifod/70976428275.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca78031e-a2d9-488f-8b71-670389f893a5/interview_questions_and_answers_examples_youtube.pdfIn PDF document text
    • https://s3.amazonaws.com/nonipesikiri/news_report_background_video.pdfIn PDF document text
    • https://s3.amazonaws.com/degagaziv/78947108856.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf32a592-f71a-47ee-a192-10ea1c190647/car_air_conditioner_repair_shop.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db0a01a9-a2cb-4b5f-b1af-ffcdcaacb99e/63247299631.pdfIn PDF document text
    • https://s3.amazonaws.com/wegemebufojafak/beds_are_burning_tab.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e57b195-7fe4-4636-8fc0-2a0856cc8710/11253526235.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c58cbb79-396c-4781-9e05-a815fcbbf6a9/bowiretirunozopesoro.pdfIn PDF document text
    • https://s3.amazonaws.com/kezemiradigu/timefuxovimu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/32b4777b-4b27-4ed6-a011-d7fa48570fc4/77704081358.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d645f96-06c7-4cd3-9191-db6166bb59fc/jonekugis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/732ce003-d719-4230-9651-9989d3b43b07/misejekizunugib.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_off0000e1fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1FD 5676 bytes
SHA-256: 6c206842eaafc2b0f125daaeaf4f6bc264a78a5f2a7b4a27e479539e06ba7791
font_01_sfnt_off0000f583.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF583 10504 bytes
SHA-256: 1e3d26ec81818b21b1c0ead9ec9c1c87fb870f293d4b65bf2c63fb86df72e12c

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