Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc2a01d80da05dee…

MALICIOUS

PDF

79.9 KB Created: 2021-03-28 16:14:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 43a65adcd35480bda322ba9a0b112944 SHA-1: 11682f40bc3d2b45c608ad3e0cfc28a47d938e63 SHA-256: cc2a01d80da05dee77e154d14a9b04a36f106707f732cde5f7ba673a8b2ef370
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to disposable domains and are presented as downloadable PDF files. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a large number of links on disposable hosting, suggesting a phishing or spam campaign. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

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://bologen.ru/award?keyword=human+anatomy+book+for+artists+pdf
    • http://wozupabalaviv.medianewsonline.com/what_do_symbols_mean_on_bbc_weather_app.pdf
    • http://presalle.xyz/how_to_service_a_miele_vacuum3rlrt.pdf
    • http://hopecommunitynaz.com/livestrong_daily_platelpwgd.pdf
    • http://jefijunanupe.sportsontheweb.net/python_basic_programs_download.pdf
    • http://mebel-albero.ru/radaniwpp9hm.pdf
    • https://cdn.sqhk.co/zumufapofow/aljbhik/wapibixafudetopibubup.pdf
    • http://igcopyrightverify.com/t300_key_programmer_for_sale_in_durbansp3ty.pdf
    • http://kayikciakademi.com/chrysanthemum_flower_pic5ysk6.pdf
    • https://wotigutaz.weebly.com/uploads/1/3/4/3/134361511/8478562.pdf
    • http://doucheop.xyz/zatudanb4ki.pdf
    • https://vezijukifi.weebly.com/uploads/1/3/3/9/133997169/sekemufu.pdf
    • https://cdn.sqhk.co/falugojafat/rDheBie/66337017611.pdf
    • http://nadipewin.mywebcommunity.org/axis_bank_latest_fd_rates_2020.pdf
    • https://jibuzuku.weebly.com/uploads/1/3/0/7/130739289/699cd10c6a574b.pdf
    • http://mimisijuz.mypressonline.com/fisiopatologia_de_insuficiencia_cardiaca_izquierda.pdf
    • https://setejurisu.weebly.com/uploads/1/3/2/7/132740540/leveponejara_wepugexovegelem_bivaleg_zowuk.pdf
    • http://help-bluebadgecustomer.com/senorurekaxafilinododvqp6i.pdf
    • http://topshops.website/sh_digraph_printable_worksheetsxj9i3.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://jirabasojexosud.atwebpages.com/made_easy_mathematics_book_for_gate_download.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed00.bin
63fa46008b166a750e7f239bce6b2e559c73b4f56f1e4cce51a1f19630858266		 pdf-font-stream PDF embedded font (sfnt) at offset 0xED00 5188 bytes
font_01_sfnt_off0000fe7e.bin
0f9166aff77be2a8a8c4eec137470652a2907f2dbc2c39d9b50aca6758a719c5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFE7E 11148 bytes
font_02_sfnt_off00012441.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12441 4324 bytes

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