Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c3f6ae2e9a2e0b9…

MALICIOUS

PDF

82.2 KB Created: 2021-03-01 18:01:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: f1116aba4aeed9d3d71ecf8c901a07b8 SHA-1: e9d971ffdbfa3a40eb51ddf9ed3e724c740e2417 SHA-256: 2c3f6ae2e9a2e0b9ce149294f924cf8001e7b572bd7f86105e0acbc5a5ec47f1
186 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, identified as a link farm, suggesting a phishing or SEO manipulation scheme. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and embedded URLs point towards a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/wix?keyword=princess+the+hopeful+merits PDF link annotation
    • https://cdn.sqhk.co/jigugabopu/jhsjgTJ/80675433707.pdfIn PDF document text
    • http://aycotoro6.xyz/136873487145zmuv.pdfIn PDF document text
    • http://investorlands.ru/tibudekulizodidagunalofid1s80i.pdfIn PDF document text
    • http://liwexun.mywebcommunity.org/patiwozelarojizogisomesuk.pdfIn PDF document text
    • http://bu-markett.com/back_to_the_future_2_movie_download_in_hindi_mp47v7mo.pdfIn PDF document text
    • https://bifawodeg.weebly.com/uploads/1/3/5/3/135348479/e083a88ef.pdfIn PDF document text
    • https://cdn.sqhk.co/nawakema/djjhdgc/79811375518.pdfIn PDF document text
    • http://wogivodugakovek.mygamesonline.org/best_book_for_ethical_hacking_beginner.pdfIn PDF document text
    • https://cdn.sqhk.co/difixoruze/jOhjjgp/microsoft_launcher_vs_nova.pdfIn PDF document text
    • https://cdn.sqhk.co/dutebosatu/RECGwgp/susamodumijezawilak.pdfIn PDF document text
    • http://manovina.mypressonline.com/which_braun_ear_thermometer_is_best.pdfIn PDF document text
    • http://bestunew.xyz/3948272846k0wei.pdfIn PDF document text
    • https://cdn.sqhk.co/lilomovetum/HjejgRQ/eclub_east_bay.pdfIn PDF document text
    • http://xiwakaravivomik.scienceontheweb.net/gejavowotikar.pdfIn PDF document text
    • http://vitofemegawe.getenjoyment.net/38814568594.pdfIn PDF document text
    • http://kopuvimu.scienceontheweb.net/what_to_put_inside_a_first_aid_kit.pdfIn PDF document text
    • https://cdn.sqhk.co/dodamewope/jaUggJ4/multiplayer_battle_arena_games_for_iphone.pdfIn PDF document text
    • http://hookup750.website/759706789670ujql.pdfIn PDF document text
    • https://cdn.sqhk.co/loganidob/Ehjhahg/minecraft_education_edition_download.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wugujub.onlinewebshop.net/6_ps_marketing.pdfIn PDF document text
    • http://gevejonitu.onlinewebshop.net/51214264823.pdfIn PDF document text
    • http://wugujub.onlinewebshop.net/fibijinurulimed.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_off00010639.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10639 5048 bytes
SHA-256: a7e7cd6e564fc92a0bb9952c39170868741b9b8f1e1ab348cbb19f500c931ca0
font_01_sfnt_off0001173f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1173F 10568 bytes
SHA-256: 77b2dc7b2929927e96a17919bde8a405ce9bd9b6b1151800a17443edd8d19b20

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