Malicious PDF — malware analysis report

Static analysis result for SHA-256 db227bfb88927817…

MALICIOUS

PDF

72.1 KB Created: 2021-03-04 20:37:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 0b177df325aa0b4f29f6fb346cfd7b5f SHA-1: f2c8d786f030c4abfe17019f9117954a58376f27 SHA-256: db227bfb8892781751bad360d42e8155f53204733cdb89c9eac364ae229507a9
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including ML and ClamAV, as malicious. It contains numerous external URIs, many hosted on disposable domains, suggesting a link farm or phishing attempt. The presence of embedded URLs and the overall structure indicate an attempt to redirect users to malicious sites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • 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 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://xezojetit.ru/strik?utm_term=sandisk+secure+access+hack+v3 PDF link annotation
    • http://rejonanujezeke.22web.org/dd-_wrt_openvpn_configuration_guide.pdfIn PDF document text
    • https://ninitirasaru.weebly.com/uploads/1/3/5/3/135317350/54c5229dee5c9.pdfIn PDF document text
    • https://duluvozega.weebly.com/uploads/1/3/5/3/135327827/fobewit.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370055/normal_601add0116468.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465257/normal_5fd3b2db2b96b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482188/normal_5fed98ad45f97.pdfIn PDF document text
    • https://ritojajugub.weebly.com/uploads/1/3/5/9/135984917/85f43501acb.pdfIn PDF document text
    • http://basomivunowa.22web.org/cheque_printing_software_free_excel.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459640/normal_5fcf6447dadb0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393019/normal_5fffebe88e627.pdfIn PDF document text
    • https://kanexunife.weebly.com/uploads/1/3/2/6/132681916/d3521cf96b.pdfIn PDF document text
    • https://duzozutilitu.weebly.com/uploads/1/3/0/9/130968921/bipotu-zumonubibujuvud.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wepezip.epizy.com/bus_stop_marathi_movie_300mb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eda63111-2d70-4ff9-bb66-82c19ab58742/reiki_level_3a_symbols.pdfIn PDF document text
    • https://s3.amazonaws.com/juvuraguvutoxif/bujifuwumajibofuvomomaso.pdfIn PDF document text
    • http://rivamuboxu.epizy.com/23441677265.pdfIn PDF document text
    • https://s3.amazonaws.com/gupawupigawono/bottom_navigation_bar_badge_android.pdfIn PDF document text
    • https://s3.amazonaws.com/kulinisokakewi/54359660519.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b9b0ffe7-00c9-4ae1-9e9f-2986df6962cb/tipenafilamivid.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1109e7cc-58f6-46b4-bb14-32209c67a580/54094102739.pdfIn PDF document text
    • http://pamakejexo.epizy.com/mesamifuwojumodokubusoduf.pdfIn PDF document text
    • https://s3.amazonaws.com/fixararololu/phone_screen_hd_photo.pdfIn PDF document text
    • http://pibasas.epizy.com/fuvidurusofegonu.pdfIn PDF document text
    • https://s3.amazonaws.com/farowug/2_phase_simplex_method_minimization.pdfIn PDF document text
    • http://jesasudazewur.epizy.com/saccharomyces_cerevisiae_fermentation.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_off0000de72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE72 5384 bytes
SHA-256: 8af4b4c1e6c619d274808ea3366c08e2b9232e5afe66aa1f6d47c82f68545b47
font_01_sfnt_off0000f0c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0C9 9972 bytes
SHA-256: b01ce7636bdb76fee2140e8afa76a6aaf5a9aa7def407ce38acdfeaadf89399d

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