Malicious PDF — malware analysis report

Static analysis result for SHA-256 5cc1446c7de0822c…

MALICIOUS

PDF

79.4 KB Created: 2021-03-28 22:29:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 08f7503fe27a8f99c057208305297a6d SHA-1: 4b7db9cb57db236c29f9b8b513fae9b0778e7a66 SHA-256: 5cc1446c7de0822c9fcff9343e7dea53f5ad00ee6637e33851ccf85f28838149
126 Risk Score

Malware Insights

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

The sample was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier, indicating malicious intent. It contains numerous embedded URLs, many pointing to disposable hosting, suggesting a link farm designed to redirect users to phishing or malware distribution sites. The heuristic PDF_SEO_DISPOSABLE_LINK_FARM specifically highlights this behavior.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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/award?keyword=agricola+game+rules+pdf PDF link annotation
    • http://nosinoski.shop/sofewumezagadelipijugs08g.pdfIn PDF document text
    • http://nomudepalak.medianewsonline.com/split_mac_online.pdfIn PDF document text
    • http://medicalpracticementor.com/pabusolowarafajunidife074fq.pdfIn PDF document text
    • https://cdn.sqhk.co/pugudanirav/dggwYjd/59660809722.pdfIn PDF document text
    • http://wamipivifubape.sportsontheweb.net/79874494102.pdfIn PDF document text
    • https://cdn.sqhk.co/gajamomol/XijiAjC/73162223969.pdfIn PDF document text
    • http://maewallace.com/christmas_reading_comprehension_3rd_grade6giy7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386366/normal_5fe33149449c2.pdfIn PDF document text
    • https://cdn.sqhk.co/semiwewedazi/ihEhhjl/45748006851.pdfIn PDF document text
    • https://cdn.sqhk.co/mibajufaneja/hz1hajq/idle_civilization_world_history_mod.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379733/normal_604952d65a900.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424951/normal_602f22ab4d81b.pdfIn PDF document text
    • http://cleanup-sale.site/72656148266xpec5.pdfIn PDF document text
    • http://pefiworawodud.mypressonline.com/basic_accounting_concepts_in_telugu.pdfIn PDF document text
    • https://cdn.sqhk.co/xubipoxeguza/WyHgiYc/mod_among_us_always_imposter_ios.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cae2aa39-5014-47ec-b549-0fed73f36d02.filesusr.com/ugd/c8683e_d0da28ac5915456ba7271c473dc82b9f.pdf?index=trueIn PDF document text
    • https://3e1ae61b-6b68-46dc-8a90-d1c7a5b9f91c.filesusr.com/ugd/b8bbd7_1b4e1c2e3cc84214b1946d75f6e67380.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wuwabobujasivor/taco_bell_hawaii_menu_mililani.pdfIn PDF document text
    • https://s3.amazonaws.com/paxivogedewilu/mipemugof.pdfIn PDF document text
    • https://s3.amazonaws.com/nosepevozux/jafupewogep.pdfIn PDF document text
    • https://7c9e9c40-2b96-4f88-8065-b5ff5e495659.filesusr.com/ugd/3bfcae_0ecfe9eba1b84889877256278f978416.pdf?index=trueIn PDF document text
    • https://3f46bf15-0a8c-4e80-b3e5-a2e3bf90e008.filesusr.com/ugd/8e6e76_2d87554184784903b7efc1ecad0242d6.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wapabefizosumi/android_x86_graphics_card_support.pdfIn PDF document text
    • https://s3.amazonaws.com/lopadivupudexa/all_expenses_and_losses_always_having_answer.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_off0000f854.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF854 5464 bytes
SHA-256: 351244b956a65aa4c8cda114b3a1e74541e06d2ec70fdd6a223c89634ef17c94
font_01_sfnt_off00010ad9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AD9 10940 bytes
SHA-256: abc231aebe651ac4a7fa5e9cb46c872973c5ac8c31afd16569539fe48e7fa961

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