Malicious PDF — malware analysis report

Static analysis result for SHA-256 faf65d42bbe5014e…

MALICIOUS

PDF

75.6 KB Created: 2021-02-16 19:40:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: d2cdac52cadbc106f18feee1cb43ccdb SHA-1: 4bc33adba961d6be943f61c03425bd80a27098ca SHA-256: faf65d42bbe5014e34aa2fec3d91500e2cb9df57887540006ea2cc3ba62c342c
184 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by multiple heuristics, including a critical alert for malicious redirector links and ML classification. The embedded URLs point to known malicious infrastructure and disposable hosting, suggesting a phishing or malware distribution attempt. No scripts were extracted, but the PDF structure itself facilitates redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/strik?utm_term=how+do+you+use+a+tennis+ball+for+plantar+fasciitis In PDF document text
    • https://static.s123-cdn-static.com/uploads/4409998/normal_5ff33cc373303.pdfIn PDF document text
    • https://retezuve.weebly.com/uploads/1/3/2/7/132741149/volifabofisejaw.pdfIn PDF document text
    • https://cdn.sqhk.co/nupegefozub/RITjegc/little_miami_covid_dashboard.pdfIn PDF document text
    • https://cdn.sqhk.co/noperizapewo/INvgcjh/24348366607.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481173/normal_60189f480fb54.pdfIn PDF document text
    • https://moxizeza.weebly.com/uploads/1/3/3/9/133999163/putoxidozaxafa.pdfIn PDF document text
    • https://bivibubumi.weebly.com/uploads/1/3/1/6/131637176/wozigopawe.pdfIn PDF document text
    • https://cdn.sqhk.co/gusisitixinu/cFiegiI/old_national_bank_headquarters_phone_number.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492575/normal_5fd782616b3a6.pdfIn PDF document text
    • http://wefabawatewe.22web.org/paypal_money_adder_app_free.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443815/normal_6029701b3680a.pdfIn PDF document text
    • https://cdn.sqhk.co/peretudiwi/jiDwbhb/wewepogavazavusazaxikiv.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413707/normal_5ff7742dbb56c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423133/normal_601d58c880e5e.pdfIn PDF document text
    • http://paxawujaxoda.22web.org/modle_cahier_des_charges_maintenance_informatique.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470532/normal_5fe2bc0dce682.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4530036/normal_601b05ca3af4a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462678/normal_5ffacdd1b47e7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kovudefimure.rf.gd/capitalismo_informacional_dit.pdfIn PDF document text
    • https://s3.amazonaws.com/wanalovum/vpn_master_apk_older_version.pdfIn PDF document text
    • https://s3.amazonaws.com/fasudikek/genuwuwarakulojujujoruk.pdfIn PDF document text
    • https://s3.amazonaws.com/gasodamuza/best_fonts_for_posters.pdfIn PDF document text
    • https://s3.amazonaws.com/susonanezaj/arrayadapter_android_kotlin.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_off0000e9ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9CE 5444 bytes
SHA-256: 58b54fc155c7b5d7087afe0f8a6c57d8df698b532e41616f27d6e00d2f9f1657
font_01_sfnt_off0000fc70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC70 10628 bytes
SHA-256: 7aa0560e92681b85efc4c65caee73ce18f455efc8b9f7ce81a6485848f2a363a