Malicious PDF — malware analysis report

Static analysis result for SHA-256 c48454ad67d92e18…

MALICIOUS

PDF

83.2 KB Created: 2021-05-29 17:46:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: c69f3d3528c21ac7080e7f98f175f93e SHA-1: 2994d273bff9a8046a82368a2715167f8b6db394 SHA-256: c48454ad67d92e185562d8a21ad8147311fb42fda8a34e5c0aae0b6764157e50
156 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. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • 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.
  • 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://crophysi.ru/strik?utm_term=what+is+employment+equity+and+affirmative+action PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4421342/normal_601fe3dcae038.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416787/normal_6052b030675d6.pdfIn PDF document text
    • https://vatopefo.weebly.com/uploads/1/3/1/3/131398509/mawiputa_sepilowoz_lozemaxe_lotonusadowej.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402261/normal_6025ef01854dc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494681/normal_604040b89e8f6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393036/normal_603c382118cf0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412160/normal_6017d62d0ffbb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469106/normal_602ef57331e1b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458163/normal_5fd66fc72dc76.pdfIn PDF document text
    • https://lijixavin.weebly.com/uploads/1/3/4/5/134598275/2f955c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491148/normal_6020460f3807a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392457/normal_6054480e338ab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461746/normal_6042f0f56bb0b.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4478951/normal_60aff8689e31d.pdfIn PDF document text
    • https://sizosunobefema.weebly.com/uploads/1/3/1/4/131453016/zurejade_bominutupete_zenuborosoba.pdfIn PDF document text
    • https://donefuvo.weebly.com/uploads/1/3/1/1/131164418/1436351.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/62f49fca-f312-4a5a-8778-4d33f8988ec8/is_blink_charging_stock_a_buy.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db9a1bc1-db0b-4438-b1e2-3f4ccebed5ee/what_are_the_different_types_of_plate_heat_exchanger.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/02bb1cb6-1f06-4572-bd14-644d47e6e824/ketawobe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e4eff55-1e77-4fe2-8984-cc737f9fa9af/python_crash_course_2nd_edition_a_hands-on_project-based_introduction_to_programming_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c0ff8c3-15ab-40da-a1c3-5a11b64d123c/finding_the_perimeter_of_polygons_worksheets.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000106b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106B5 5696 bytes
SHA-256: c81eda5b452ee989f0c2f6e3f43b95e665e1420b23ce01c6ab7d6051bfc439e2
font_01_sfnt_off00011a01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A01 10740 bytes
SHA-256: 058482221406cae333988eb4f1ea3ced10b5e6844a741bb01f7a8addddfd792f

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