Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8f152f1e6bedc05…

MALICIOUS

PDF

89.5 KB Created: 2021-05-30 14:05:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: af1a080be75e17bd457e974cac5c93dc SHA-1: f8641891eb51847e4872710a82729bb2d217a71e SHA-256: e8f152f1e6bedc0536a9f056319edcb7289562f5fc89967426dbd3c46d1f5db8
196 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains multiple external links, with one prominent URL pointing to a potential software download. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting a malicious intent to redirect users. The 'SE_SECURITY_BYPASS' heuristic further suggests malicious activity by instructing the user to disable security software.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Security software disable instruction high SE_SECURITY_BYPASS
    Document instructs the user to disable antivirus or security software — unusual for ordinary documents and high-risk in an unsolicited file
  • 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://xajibur.ru/123?utm_term=kmspico+10.+2+axeload.+rar PDF link annotation
    • https://futinenapol.weebly.com/uploads/1/3/1/4/131438538/59e8b4a41b.pdfIn PDF document text
    • https://lulogozikojag.weebly.com/uploads/1/3/1/8/131858975/31bab9868a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459174/normal_6049c2ab0434a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482208/normal_605cbe58ca5a7.pdfIn PDF document text
    • https://tabikanopik.weebly.com/uploads/1/3/4/7/134705808/61ad2c4.pdfIn PDF document text
    • https://wotipivas.weebly.com/uploads/1/3/1/4/131482993/6172573.pdfIn PDF document text
    • https://guginolorenoba.weebly.com/uploads/1/3/4/7/134722040/tunumosutirige.pdfIn PDF document text
    • http://www.opentle.orgIn 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/b4b223d7-d644-4ad9-a4d8-ddd34d647033/waxewonipenos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/58a57c60-076d-4ecb-9540-0fe8f122ff11/how_to_use_wiring_mess_my_summer_car.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4826d876-4c5d-41f9-ac50-c36e8cfb0c91/crash_mind_over_mutant_psp_iso_espaol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/93ff48d9-ee96-4950-b6ad-a3a544a675b8/65348734853.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4683a3a9-2223-4bf2-8d02-9ec9c877c231/aa_5th_tradition_checklist.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d5022aa-a9cd-4556-87ea-10f6d445a004/a_level_biology_edexcel_topic_4.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e3c2bc19-948e-427e-a199-8a845bd1bff8/47801357025.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f9c558c-decf-44ce-b996-1342d65170a5/kenmore_heavy_duty_70_series_washer_knob.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f0f7b01-3827-4c00-b717-ee1ad7dc48b7/maxavis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a20bd48b-5cf5-48cf-be2f-5d2712b5c70e/centerless_grinding_process.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9cb1c350-7026-4483-a311-2582179b14a8/arnold_schwarzenegger_encyclopedia_of_modern_bodybuilding_download.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://www.gnu.org/licenses/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000fe5e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xFE5E 13368 bytes
SHA-256: 5f61b8baca80e5e6b6457c40b5615a5d035920c72e0d846e1fef4a532cf7a3b7
font_00_sfnt_off0000eb52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB52 5612 bytes
SHA-256: 36f0aac7196a340537a1f05ff3ab453965b6ed1a6b1603525ce75ae54927dc45
font_02_sfnt_off00012397.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12397 22460 bytes
SHA-256: 46c2cd05a86d751e14a363d5debfe4f311dd741544f010332c26c2d5c6c9a488

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