Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a0ce2ed34893c35…

MALICIOUS

PDF

74.8 KB Created: 2020-11-19 06:06:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 8847b32fef4ff110356a3905933149e6 SHA-1: d2db4253daac1187a77b798425a27c75f97f8d94 SHA-256: 0a0ce2ed34893c356e059288dd61ecce656a7f7a7b1a03188c533273a4e81723
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://ggtraff.ru/strik?utm_term=leer+online+50+sombras+de+grey+conta In PDF document text
    • https://wajiresejepo.weebly.com/uploads/1/3/0/7/130774962/ad8bc52ea910.pdfIn PDF document text
    • https://tolixolosunep.weebly.com/uploads/1/3/4/4/134403343/b1519df79f77c6.pdfIn PDF document text
    • https://jejejawoberug.weebly.com/uploads/1/3/4/7/134768650/duresot.pdfIn PDF document text
    • https://pesulomerusetus.weebly.com/uploads/1/3/4/1/134109359/adb480022.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/90605f8a-28b2-4e1b-b6e5-e3c2e3a3f237/slope_intercept_form_problems_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/52c99bb1-58aa-4ffc-ac83-af67f7e36354/51185244984.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df7ef56a-77c8-4043-8f7b-7a35e8eab315/repepufuvurakapogiwusuda.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7665ee22-29f7-4510-aad3-1702ccd60f58/84148412371.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a42f05e-b98a-4c0d-a26e-4426ef88afdc/memafikimatibenumutikutu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe6379c5-aa4d-41d7-89e9-d8c592b9af1e/zujikajurofalovexepebajef.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f1f23bea-cac3-48fc-884d-2d51262fdb99/boxusaxim.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe3bf133-e393-4212-9f02-12bc558f08d9/34904838008.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7343a571-9da5-4229-930e-ea5a03a5ad34/manitou_telehandler_service_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f069e7ee-fc9a-41a7-ae08-8821ab3ed5b5/mulaxelurofe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f9853c41-8da7-4393-97ca-0b5ba0447542/honeywell_thermostat_manual_rth111b.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/62e50d6b-e975-4286-8212-fc0eb42c9f30/fofafofofuri.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/536518eb-5587-4af7-96cf-e3ccaaba6e2f/brand_ambassador_contract.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_off0000cde7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDE7 5708 bytes
SHA-256: 07dbd048d7bc00d4e7ec38042420d04904e0157d856bbb771f3bc3ab614b7956
font_01_sfnt_off0000e14b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE14B 12236 bytes
SHA-256: 6f2910d42900bc647332aa76bf15c626972407e526ba4d7737916cc4e3c528d5
font_02_sfnt_off0001090c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1090C 16060 bytes
SHA-256: d8a1a34de14a7b8fce5e51635835121d353d188f9ac9ce1e11538509fd4c5cdc

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