Malicious PDF — malware analysis report

Static analysis result for SHA-256 d24207ef0033c060…

MALICIOUS

PDF

79.5 KB Created: 2021-03-05 02:30:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: caa691ecb0836809a61367c4f90d9d7a SHA-1: a60cbab7aef9e2b0682a9528458d2c4ba26a2d9d SHA-256: d24207ef0033c0603a61efd8f7758616ca9896559d7f9077a9aca1818cb53276
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The document body, though heavily obfuscated, contains a title that appears to be a lure for search engine optimization or to entice clicks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://gimoguvi.ru/award?keyword=what+books+were+removed+from+the+bible+in+1684 PDF link annotation
    • http://gufutaca6.xyz/og_mandino_university_of_successv2ibs.pdfIn PDF document text
    • https://roxilegetewus.weebly.com/uploads/1/3/4/7/134721251/wimurexasetuduju.pdfIn PDF document text
    • https://zatagigozot.weebly.com/uploads/1/3/0/7/130775916/bugiv-bonizudugi-diferowolem-baminiwipoz.pdfIn PDF document text
    • https://remofixar.weebly.com/uploads/1/3/0/7/130776049/1741132.pdfIn PDF document text
    • http://creditinquiry.info/h3po4_is_a_stronger_acid7151j.pdfIn PDF document text
    • https://vuligezu.weebly.com/uploads/1/3/5/3/135391643/gimumazunuruj.pdfIn PDF document text
    • http://sberin.xyz/how_to_reset_roomba_7809h3ii.pdfIn PDF document text
    • https://gedamalemomomig.weebly.com/uploads/1/3/4/5/134504316/dunetoj_fizavetojitikag_kitanabobegi.pdfIn PDF document text
    • http://virutimi.22web.org/10869691761.pdfIn PDF document text
    • https://rebumazezip.weebly.com/uploads/1/3/4/8/134860465/jugajelapot-mireti.pdfIn PDF document text
    • http://gopubewigofopa.iblogger.org/muribumuginitipuxofel.pdfIn PDF document text
    • http://fenopageliterow.iblogger.org/kizikubizugudujoberovojum.pdfIn PDF document text
    • https://wilaruxade.weebly.com/uploads/1/3/4/8/134865150/bubuzu.pdfIn PDF document text
    • http://cooldomen.space/84704842951hiuoq.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://1f571a09-6495-4108-bd1a-9715deae29b5.filesusr.com/ugd/b0bf26_cef353500a9b49df8ca573fc44cc388b.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/db67d099-b88e-4126-b0d0-4275393c9dd1/deskjet_6988_wireless_setup.pdfIn PDF document text
    • https://f05e0dbb-21cf-40ea-8b71-00b8d6f49a3b.filesusr.com/ugd/b09e1d_440a571caeb14ae784771f28e8eaa232.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/b18baf1a-081b-464c-a767-5dc5013cc120/what_qualifies_as_two_forms_of_id.pdfIn PDF document text
    • https://203e7bc3-08d7-4ecc-a8df-f797e0d4a079.filesusr.com/ugd/d4579c_5e3449613f16447b9a40827542a79c9b.pdf?index=trueIn PDF document text
    • http://lenixad.epizy.com/distributed_systems_interview_questions_and_answers.pdfIn PDF document text
    • https://d5e9a058-cbdc-4968-ba72-30cdbf1e36a3.filesusr.com/ugd/9cfd0a_851547fa4254426f840317e363a22ba2.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/a7bda5f6-3563-4792-a3b8-6fe96f40ef4a/theta_healing_training_ireland.pdfIn PDF document text
    • http://durunorutap.epizy.com/49640529316.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_off0000f5a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5A3 6004 bytes
SHA-256: 2c7de7d3b6918a4b6de10ebe1aef8d44321fe7e0713ad3fa0db709ff5bada96b
font_01_sfnt_off00010a0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A0E 11328 bytes
SHA-256: e4fc83c514fbe78bc463cd84cb9f8354fca9ada01e584e5bca204866daf17d7b