Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa03ab92013ff1ac…

MALICIOUS

PDF

75.2 KB Created: 2021-01-29 02:41:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: be7520aa1c229f267a2acd380e06119e SHA-1: f6a9eb1be291c366da030438a32d1e7e1b08ebe2 SHA-256: aa03ab92013ff1ac54123daf33686c00c06dc85542e132f83af51a67d41c65fc
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to disposable domains and are flagged as part of a link farm. ClamAV detection and ML classification strongly indicate malicious intent, specifically identified as Pdf.Phishing.Trojan. The presence of external URIs and the nature of the heuristics suggest the document is designed to redirect users to potentially malicious sites, likely for phishing or malware delivery.

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://maypoin.ru/wb?keyword=descent%20road%20to%20legend%20the%20delve%20review PDF link annotation
    • http://whysmall.space/commander_legends_commander_decks_release_datezl580.pdfIn PDF document text
    • https://cdn.sqhk.co/mekerijiwuv/gwjcpje/porisomokifamubujir.pdfIn PDF document text
    • http://amandeepsadyora.com/tektronix_tds1002b_driver2fqd8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403556/normal_600a91bc16eb3.pdfIn PDF document text
    • https://cdn.sqhk.co/libavesonon/hcgjiif/best_hits_of_all_time_youtube.pdfIn PDF document text
    • http://ottics.ru/free_online_air_hockey_tournament_games9pmew.pdfIn PDF document text
    • https://cdn.sqhk.co/soxuxopova/hgnidid/kasew.pdfIn PDF document text
    • http://bathforlegs.xyz/flight_simulator_online_mobilemohku.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453721/normal_60081fe3e893b.pdfIn PDF document text
    • http://samettemiz.xyz/90269678528lirjh.pdfIn PDF document text
    • http://am-sound.ru/83611216012bcwti.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wepinipinalojud.epizy.com/biugo_pro_mod_apk.pdfIn PDF document text
    • http://gusufarafedi.epizy.com/create_mailing_labels_from_excel_spreadsheet.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_off0000ea4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA4C 5352 bytes
SHA-256: 87be4d793044007328dbca3a677788eef743cb7a44aed8cfbfc87850b3cca15f
font_01_sfnt_off0000fc90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC90 10324 bytes
SHA-256: a4b502997aca84d3a488789ddd8e1f1661d7b022177a227e4f6965d4efcd1ab5

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