Malicious PDF — malware analysis report

Static analysis result for SHA-256 e97981073e560a18…

MALICIOUS

PDF

79.0 KB Created: 2021-05-05 11:49:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: e82ff04a61c4fd9bbb3b0f1e4ac3431b SHA-1: 26fbb5ce15ea25458de93ad4a442e8abb0b7452d SHA-256: e97981073e560a18ecccf9efeea263bef53fb542afb4127e468c1c3e54e876da
126 Risk Score

Malware Insights

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

The PDF contains a high number of embedded URLs, many pointing to disposable hosting and exhibiting link farm characteristics, strongly suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection further support its malicious nature. While no scripts were directly extracted, the PDF structure and numerous external links indicate an intent to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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://ponafet.ru/strik?utm_term=walgreens+have+blood+pressure+monitor PDF link annotation
    • http://sazulido.medianewsonline.com/porejutajopusil.pdfIn PDF document text
    • http://nakalabaxis.mywebcommunity.org/14384177982.pdfIn PDF document text
    • http://vufilulojusabid.iblogger.org/sipujinerirapejusadunoj.pdfIn PDF document text
    • http://rukofuvifoti.22web.org/42015598873.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
    • http://wekapalipewux.epizy.com/anthem_blue_cross_wisconsin_prior_authorization_form.pdfIn PDF document text
    • https://5849b288-062f-49f8-a71b-da420f1f00fd.filesusr.com/ugd/c068f8_2eb0f38f64154091b4741b233a2f1ad8.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/32c9e80e-ddee-4ad3-afb1-ff4564311afc/jibaluxubemobewubiroruxa.pdfIn PDF document text
    • http://dabevejef.rf.gd/57332266935.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ad5f25e-967e-4342-a30d-4e0cfd983423/dewalt_3400_psi_pressure_washer_parts_manual.pdfIn PDF document text
    • https://b20aee1f-b1b7-4e4e-be5e-d884e4ece670.filesusr.com/ugd/10e3af_67bdf06ff5054008ba27ec58ec2e6904.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/silubebebefuju/burnout_paradise_remastered_pc_size.pdfIn PDF document text
    • https://s3.amazonaws.com/kibavutibeved/40016075634.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f0668b2-7cb7-43c0-8719-64ed5c76e600/39583600892.pdfIn PDF document text
    • http://figaniver.epizy.com/60729735107.pdfIn PDF document text
    • http://zufavikog.epizy.com/the_science_of_near_death_experiences.pdfIn PDF document text
    • http://meziwupagev.epizy.com/advertising_and_sales_management_book.pdfIn PDF document text
    • https://26c1613e-5d28-4fa3-89cb-3d2c9ab59faf.filesusr.com/ugd/fe83c3_131459cc0adf493f8169c6f507405c48.pdf?index=trueIn PDF document text
    • https://178fd8f3-986e-459b-a431-83c1f58eadb8.filesusr.com/ugd/7a8e82_1696e2c80f8c4004b0b998e8037cdd88.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_off0000e9cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9CD 5468 bytes
SHA-256: 754b7ad92829056365dfcff301862c2be92a9f99a2d7bda974d060d008de6289
font_01_sfnt_off0000fc37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC37 10684 bytes
SHA-256: b8583726dacfc209335f5fc0744d31d2ae15c17736e24abda7353677c00a726f
font_02_sfnt_off00012087.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12087 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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