Malicious PDF — malware analysis report

Static analysis result for SHA-256 a52e2ca7b44e70b5…

MALICIOUS

PDF

62.9 KB Created: 2021-02-19 08:21:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 0138a6df77bd8f417f9234126fb29e0c SHA-1: d562a8e74655a38f59adeaec1de243f6ccb38dbb SHA-256: a52e2ca7b44e70b5679e6a8c63e835722c080f188eed51c571894f57bc9a591b
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. It contains embedded URLs that redirect to potentially malicious domains, suggesting a phishing or malware distribution scheme. The document body, though heavily obfuscated, appears to contain metadata related to a product search, which is likely a lure.

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://jacksth.ru/wb?keyword=panasonic%20kx-tgda20%20extra%20handset PDF link annotation
    • http://luminar4-download.xyz/11407696208lis0w.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387806/normal_601fef59eed85.pdfIn PDF document text
    • http://topsale.pro/great_dictator_2012_movie5pnef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371010/normal_5fd12422d3541.pdfIn PDF document text
    • http://zoosalon.org/2935513040ri13a.pdfIn PDF document text
    • http://haifaiv.ru/electrical_wiring_residential_8th_editionxuyl0.pdfIn PDF document text
    • http://hookup668.site/mii_music_sheet_musicghlp9.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/laginekux/32670344972.pdfIn PDF document text
    • https://s3.amazonaws.com/desenaz/30486185945.pdfIn PDF document text
    • https://s3.amazonaws.com/lazolu/vasinuxaguwibibo.pdfIn PDF document text
    • http://kusogit.rf.gd/sarthi_kisan_mitra_online_form.pdfIn PDF document text
    • http://relogevavikidid.epizy.com/gobutilovupibasefisag.pdfIn PDF document text
    • http://vimitafukufes.rf.gd/apologize_movie_songs.pdfIn PDF document text
    • https://s3.amazonaws.com/sosupejuxofedo/xunotojubokologixirivo.pdfIn PDF document text
    • http://wasaxotudulolo.epizy.com/jisolalogarakagoreniduxib.pdfIn PDF document text
    • https://s3.amazonaws.com/futamo/chori_chori_mamar_chori_dj_song.pdfIn PDF document text
    • https://s3.amazonaws.com/jupudizadid/uc_browser_browser_apk.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_off0000b514.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB514 5608 bytes
SHA-256: 503da5e74a36e8f54293ac9f8d0505df0bfa77605f4c44f85ff17ccde10cc6ce
font_01_sfnt_off0000c836.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC836 11280 bytes
SHA-256: 6101858ec9c4604a4a209cfdaa859e0f913d5b1d4d2e8809e5350234a28b1d26

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