Malicious PDF — malware analysis report

Static analysis result for SHA-256 93c4c9ce6945a15d…

MALICIOUS

PDF

84.2 KB Created: 2021-04-13 14:21:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 9fa3fe404a8a22553359d49476734b51 SHA-1: b2ecd274a6da64f9aa095ce6de2e5b4c1effbe5a SHA-256: 93c4c9ce6945a15d603fd838437f2a0d54e6d6fc5fea90f09f5cd9d3c4914910
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, indicating a link farm or SEO manipulation tactic. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were directly extracted, the PDF structure and numerous external URIs point towards a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://fokemale.ru/strik?utm_term=eye+of+the+beholder+movie+meaning PDF link annotation
    • http://zonojebiridizo.mywebcommunity.org/42277024128.pdfIn PDF document text
    • http://bewewafip.scienceontheweb.net/monster_vs_aliens_episode_11.pdfIn PDF document text
    • http://rubolanir.mypressonline.com/nefitex.pdfIn PDF document text
    • http://vijevejumozugim.sportsontheweb.net/58884141657.pdfIn PDF document text
    • https://rogapunuki.weebly.com/uploads/1/3/4/3/134375427/xonenozugiromojat.pdfIn PDF document text
    • http://xasedogamif.mypressonline.com/what_is_review_of_related_literature_all_about.pdfIn PDF document text
    • https://gofazawadatefit.weebly.com/uploads/1/3/5/3/135349405/9799971.pdfIn PDF document text
    • http://pewadulojuba.mypressonline.com/49538447400.pdfIn PDF document text
    • http://palikexifumalam.mywebcommunity.org/the_banker_s_secret_marc_eisenson.pdfIn PDF document text
    • http://sisogelodaze.medianewsonline.com/biblia_reina_valera_1960_audio_mp3.pdfIn PDF document text
    • http://bobujopolodusol.mygamesonline.org/dfd_payroll_management_system.pdfIn PDF document text
    • http://xizapataruxeku.mygamesonline.org/beniwa.pdfIn PDF document text
    • http://letinebab.mywebcommunity.org/vamilebipobivumamogivus.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://952d9f4b-853a-4e85-af28-23c4d489d487.filesusr.com/ugd/8db125_30fb69547e534910abc02adb6630a69f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vatosolikijike/monitoring_and_evaluation_process.pdfIn PDF document text
    • https://59548cc9-d6a6-4b2e-bd73-2bfb7290c7b5.filesusr.com/ugd/3fd21f_aab008616e5242efa39d3217496b2e74.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tibanepoxilibud/exerpeutic_recumbent_bike_4000.pdfIn PDF document text
    • https://36c7e617-1221-4173-b726-d5bce2878801.filesusr.com/ugd/610d21_6349c3e4c89a4a6cad28928de3ae18b9.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/metubevozisul/barry_callebaut_annual_report.pdfIn PDF document text
    • https://37523d11-79cf-4eb3-ada4-f05de57c71ee.filesusr.com/ugd/275374_99f9b7f20a2b4b42a7587bd227f471ff.pdf?index=trueIn PDF document text
    • https://4e33067b-0f13-4bed-bb9c-ea95f768fd7c.filesusr.com/ugd/23924c_849d4a74ce984b7b9523e830c97289df.pdf?index=trueIn 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_off0000f96d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF96D 5188 bytes
SHA-256: 208e95bb86a8024bf8ee5498ab72b474dce29d8a529602236d342057bb161afb
font_01_sfnt_off00010af8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AF8 12228 bytes
SHA-256: b2ecfd79b06279fc35273400f013cadfdedc7d50d00b51730f5fb723b68d2eda
font_02_sfnt_off0001337b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1337B 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176