Malicious PDF — malware analysis report

Static analysis result for SHA-256 03d5297916adb98c…

MALICIOUS

PDF

84.3 KB Created: 2021-03-23 11:52:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 728c807a4123986ff739c1d8958edb9f SHA-1: e95b325c9456465b89a515b0ebc41642c420f956 SHA-256: 03d5297916adb98cd98bc52c75f3f7635a071c0901a5c02b0c2bfcad84cbcf98
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, suggesting a link farm or redirection scheme. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of a phishing or malware distribution attempt, likely leveraging embedded JavaScript for obfuscation or redirection.

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://nipisod.ru/strik?utm_term=linksys+ac1200+amplify+review PDF link annotation
    • http://manamuposa.getenjoyment.net/mirofokejomikuruneza.pdfIn PDF document text
    • https://duwesokele.weebly.com/uploads/1/3/1/6/131606866/26fcd42db654c.pdfIn PDF document text
    • http://faceskinagainbeauty.xyz/mobepefojakokemiwami7or8.pdfIn PDF document text
    • http://pesuloduf.medianewsonline.com/gamibesevanuramoruxojo.pdfIn PDF document text
    • http://gamuxiwami.getenjoyment.net/98630107670.pdfIn PDF document text
    • http://qrastenmap.online/excel_vba_find_function_examplebmmwl.pdfIn PDF document text
    • http://niluwipewuxasa.medianewsonline.com/20643268186.pdfIn PDF document text
    • http://chestlune.online/nisumizaf9zxp.pdfIn PDF document text
    • https://zivodigogugev.weebly.com/uploads/1/3/4/6/134664532/00e6387dd265e24.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/nazekisigiduz/chrome_installer_windows_10.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec32c95d-2cb2-4b97-9c6b-12a7f16de910/project_management_certification_uk_pmi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/adf97ff2-f6eb-40aa-a6ef-315b0e01cd88/nitro_converter_free_download_for_windows_10_64_bit.pdfIn PDF document text
    • https://s3.amazonaws.com/wezukep/21456599584.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/03c3a2be-efca-4172-8d2d-7a38b2bf390f/four_tenets_of_black_feminist_epistemology.pdfIn PDF document text
    • https://s3.amazonaws.com/zedudo/97146566479.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/77581154-a385-4134-8acb-5c886c5242ff/why_is_my_total_wireless_phone_not_working.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/987c27a7-be73-4486-9448-c90d56a4286a/2015_hyundai_sonata_eco_owners_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/fojaxexino/84321323662.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_off0001067a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1067A 5744 bytes
SHA-256: 561967566c46746265009cec8bbcf22d4642ba7a71bda01bccf9281594e86d3e
font_01_sfnt_off00011a1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A1D 12052 bytes
SHA-256: 40e2b1f96ba34d7a7102c60c99f92a55c84780b684d3811437e15b70b494551b

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