Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c3e62deca71a77a…

MALICIOUS

PDF

74.9 KB Created: 2021-05-01 04:27:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 75831c1879fad8cbfd0fe8024988e46c SHA-1: b6e052492c1412d686bfc6c6217488c3fbf650af SHA-256: 4c3e62deca71a77a7e8595e8866838cb6afa3798a9ab6fc66e60a3108080c9d0
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. 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 0.9992

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://soxebez.ru/strik?utm_term=vba+word+find+and+replace+string PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4476765/normal_5fd78da270314.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369496/normal_605bf5b132048.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380411/normal_5ff9c12c8f80e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374369/normal_6022f8d520508.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488332/normal_6040eaaad1983.pdfIn PDF document text
    • http://pafowitowa.medianewsonline.com/68701438319.pdfIn PDF document text
    • http://taxoropa.iblogger.org/109_septa_bus_schedule.pdfIn PDF document text
    • http://fupomogusi.22web.org/adblock_plus_for_android_pie.pdfIn PDF document text
    • http://vumexovuvelafe.medianewsonline.com/78143775803.pdfIn PDF document text
    • http://ritegifufefut.scienceontheweb.net/l_encyclopdie_du_18me_sicle.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480905/normal_604040906103c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408324/normal_604412c11113b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484994/normal_604b34fa1eedb.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/bufipevuril/bootstrap_contact_form_7_template.pdfIn PDF document text
    • https://s3.amazonaws.com/loranoduzuja/tewiw.pdfIn PDF document text
    • https://s3.amazonaws.com/fewunadupop/insinkerator_badger_5_price.pdfIn PDF document text
    • https://s3.amazonaws.com/mejigavukolu/vosumalul.pdfIn PDF document text
    • http://wivonubezur.epizy.com/98485450663.pdfIn PDF document text
    • http://zawenorite.rf.gd/d_and_d_classes_and_subclasses.pdfIn PDF document text
    • http://firulakaw.epizy.com/gizirinufumaxutuvunona.pdfIn PDF document text
    • http://kimirukuku.epizy.com/school_education_quality_index_2020.pdfIn PDF document text
    • http://maferodo.epizy.com/bbc_iplayer_radio_failed_abroad.pdfIn PDF document text
    • http://retasanege.rf.gd/67896161694.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_off0000e56a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE56A 5520 bytes
SHA-256: ae49ce85c21a57ccef571fd76b746c9de0e290594a489da2563fdfbbb9dea23e
font_01_sfnt_off0000f852.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF852 11124 bytes
SHA-256: 2a387405508de8a7261b61e3c231f6d7bb1bc36949f0d766f7111305aa4c18e5

Open this report in the interactive analyzer, or submit your own file for analysis.