Malicious PDF — malware analysis report

Static analysis result for SHA-256 253e321a5ea5b5ae…

MALICIOUS

PDF

99.7 KB Created: 2021-02-14 00:10:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 663648a558a1da97fdedd61920811bd2 SHA-1: c55d4737bc6f823137c6e79d7718136329ef523e SHA-256: 253e321a5ea5b5ae270625cd72b14e4c7b4a036a16e96bf1434e58929ff5263c
126 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many of which point to disposable domains and are flagged as part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://bologen.ru/wix?keyword=mount+pleasant+beach+nj PDF link annotation
    • http://fomuvegikutidob.iblogger.org/android_studio_build_debug_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/melipetoluf/bjhhihg/magic_snake_shapes_easy.pdfIn PDF document text
    • http://f1l3download.site/87886608512512vh.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488566/normal_6011bbcbd1159.pdfIn PDF document text
    • http://detonic-deutschland.website/complementary_and_alternative_medicine_ielts_reading_answerszsyb8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4493876/normal_5fe2bf05db7d1.pdfIn PDF document text
    • http://tohld.in/spotify_playlist_to_android_phonexceo7.pdfIn PDF document text
    • https://cdn.sqhk.co/guwaloxipete/fZqghkO/61576084183.pdfIn PDF document text
    • https://cdn.sqhk.co/jivazufevi/QO85Fji/espn_nba_scoreboard.pdfIn PDF document text
    • https://cdn.sqhk.co/lajefage/egfgefG/40586075640.pdfIn PDF document text
    • https://cdn.sqhk.co/bexoninodag/eZijcdJ/21665333654.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mafasegu.epizy.com/37565650517.pdfIn PDF document text
    • http://tibelobal.epizy.com/rizananunot.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_off000149d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x149D4 5148 bytes
SHA-256: 9ba49f3931722c83cd40d9fd59bac1de4f5d4af8d32da905f34b839e4627f941
font_01_sfnt_off00015b5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15B5B 11272 bytes
SHA-256: 6284b265ffdbbf914f47fa558d7801e5be7f0b6908a60ff844b326412ce59a94

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