Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e24bf5f18ccb054…

MALICIOUS

PDF

89.7 KB Created: 2021-05-19 03:08:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: c9e01f1266e334ee0c1a86a69b6f4b2c SHA-1: 5810709f565840a9040ee06dfbeff28a0af45f1b SHA-256: 9e24bf5f18ccb054be2873c8dd25cbba773cc011eb5ec0ba4ee377e5879365e0
206 Risk Score

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. It uses a callback-phone (TOAD) lure. 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 0.9989

Heuristics 7

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://baarspo.ru/strik?utm_term=everstart+jump+starter+750a+instructions PDF link annotation
    • http://boludibaderujir.22web.org/vamomitebadumajixudiken.pdfIn PDF document text
    • https://gegovowazuravas.weebly.com/uploads/1/3/1/3/131398401/nevubu.pdfIn PDF document text
    • https://bafokaxaxex.weebly.com/uploads/1/3/4/8/134881351/deluda-fitikamanalat.pdfIn PDF document text
    • https://lawuzifelive.weebly.com/uploads/1/3/4/0/134041442/feea98.pdfIn PDF document text
    • https://vuligezu.weebly.com/uploads/1/3/5/3/135391643/vutatifomilud.pdfIn PDF document text
    • https://levukuwaxumofet.weebly.com/uploads/1/3/1/3/131383949/3ec1be164718.pdfIn PDF document text
    • https://giromazipudu.weebly.com/uploads/1/3/1/4/131453901/1658757.pdfIn PDF document text
    • https://zuxevuzefadum.weebly.com/uploads/1/3/0/7/130775429/fc717ab5de739.pdfIn PDF document text
    • https://wesafave.weebly.com/uploads/1/3/4/3/134307961/gogapojo_tebisuze.pdfIn PDF document text
    • https://moxuronanupew.weebly.com/uploads/1/3/4/5/134597487/243298.pdfIn PDF document text
    • https://lavovozanu.weebly.com/uploads/1/3/0/7/130739022/76ca255a.pdfIn PDF document text
    • https://tikekukitalil.weebly.com/uploads/1/3/2/7/132712015/fepilesaserepux.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/4a6798a0-42c1-45cd-ac08-9e5ebf6791a0/damutavolukinalimad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/900f0894-e470-4b6d-94b8-6bc0edf4e891/netulumivu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3363973f-df4a-4ff0-9fa5-6fbc0847452b/63983054880.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fac3c89a-5352-4440-93ad-4be437a79bd3/vapakajedovixexixuzu.pdfIn PDF document text
    • http://zigejobo.epizy.com/42670282532.pdfIn PDF document text
    • http://rowisumemosil.rf.gd/runobedorebilokixobax.pdfIn PDF document text
    • http://balukop.rf.gd/dosafumavoxuxinuwajuxam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e91d9239-c673-487e-a029-fe4cbedf3a6e/83184331635.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd5d57e2-0724-4bf3-adf9-0681074d395c/adding_fractions_with_different_denominators_and_variables.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f7ae439-c4c1-45ad-954b-f398f7b1088f/9612711783.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4bf44597-47b4-4656-8b7c-437a63c2e91e/software_project_management_online_test.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/78b383ca-e794-42f9-8aa2-ff1b884403e8/72666781631.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010302.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10302 5368 bytes
SHA-256: 71d0b202c16c3035298e88b00f1872c71287f74d32de806e3b0964b4c0683ae1
font_01_sfnt_off0001153a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1153A 16944 bytes
SHA-256: 184026ad31275e4eac72c294002d89825cfc26315a1f480c3a5cac42c8656629
font_02_sfnt_off00014a8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14A8A 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34