Malicious PDF — malware analysis report

Static analysis result for SHA-256 68f0d88299ae3437…

MALICIOUS

PDF

72.5 KB Created: 2021-06-07 11:13:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 5f8b01e8f19da3c03cc46be0f15daf0e SHA-1: 0491a664ed49fa8d86d6ffe6d529967c4cf2c08a SHA-256: 68f0d88299ae343700eb8b4a14d51a3d875055f682ed6f2fb31866374baeffa8
186 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier with high confidence. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO manipulation tactic. The presence of embedded URLs and the overall structure indicate a malicious intent to redirect users to potentially harmful content.

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.
  • 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://krisoc.ru/pbw?utm_term=reglamento+del+aprendiz+sena+2012+diapositivas PDF link annotation
    • https://wakolixib.weebly.com/uploads/1/3/4/7/134706528/8281ce083e608.pdfIn PDF document text
    • https://doritader.weebly.com/uploads/1/3/4/8/134885844/vibixajovu.pdfIn PDF document text
    • https://kasababafaraw.weebly.com/uploads/1/3/5/3/135336348/a859d926.pdfIn PDF document text
    • https://vupikesuxal.weebly.com/uploads/1/3/4/3/134397623/8787041.pdfIn PDF document text
    • https://vozedebilonede.weebly.com/uploads/1/3/5/3/135333302/zurumorezi.pdfIn PDF document text
    • https://fafutetigav.weebly.com/uploads/1/3/0/7/130775448/82394ba065e8.pdfIn PDF document text
    • https://notususapi.weebly.com/uploads/1/3/4/0/134012365/jelekitorumipob_pelijajobuga_tidoboxanize_larij.pdfIn PDF document text
    • https://lirikilufowu.weebly.com/uploads/1/3/1/0/131070293/5669730.pdfIn PDF document text
    • https://kilesikawagex.weebly.com/uploads/1/3/4/3/134372597/5177647.pdfIn PDF document text
    • https://semebikifotiz.weebly.com/uploads/1/3/4/7/134752265/6c86cb7.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/b020e825-7e0e-42f2-b16b-643ccfb298fa/22683070558.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4cae5c97-6bec-4a22-810c-68ed9839ea2e/sig_codes_practice.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bb25872d-d825-49ee-b50a-15db67a54127/bafafu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e5693cc3-c26d-458d-8b9a-ac00f903bc74/can_you_take_the_learners_permit_test_online_in_maryland.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3a9521f8-6e62-4995-a239-c8553a77a686/how_to_give_temporary_guardianship_in_texas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c33d813f-f59f-43be-bd8c-602371d1ff99/6143820427.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1bcf614d-6840-4b53-8a9a-8dfe087d8a3d/rikurepurakedimokemudi.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_off0000df4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF4C 5720 bytes
SHA-256: d19234950993845e20a8a3708e2ded5493e9388381bccbddc0521efea373fc06
font_01_sfnt_off0000f2c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2C5 9936 bytes
SHA-256: 8ea3bddc7ea5be7a19ed7fafb96393ab9a7f13a4ae781c100fd3be0053411d22

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