Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ecd092578aa756c…

MALICIOUS

PDF

84.0 KB Created: 2021-04-05 14:22:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 3fc91fcf22fa8b362781ea771599b8a2 SHA-1: 8d8b4710ac516dcedbf6bc6eb64bbcc8a8dd4b06 SHA-256: 0ecd092578aa756cf8867ec93754e3c69b43bcb331da9802064d2ddd3141eec2
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Image-heavy PDF with invisible link to suspicious domain high PDF_SUSPICIOUS_LINK_LURE
    PDF is a small image-heavy lure with invisible link annotations that send the user to a suspicious high-risk-domain URI. This matches credential-phishing carriers where the visible document is only a prompt and the real collection flow happens on the linked website.
  • 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://golowaki.ru/strik?utm_term=accu+chek+aviva+plus+test+strips PDF link annotation
    • http://scarcebook.com/launch_trampoline_park_hours_and_pricesry6s2.pdfIn PDF document text
    • http://zomaragexavope.sportsontheweb.net/unable_to_activate_tableau_product_key.pdfIn PDF document text
    • http://vbruti.site/39822307219qx3ta.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407733/normal_604e133319d30.pdfIn PDF document text
    • http://badge-verification-center.com/amplificador_fender_mustang_gt_200p7r1k.pdfIn PDF document text
    • http://gmetry.online/temerts0y2.pdfIn PDF document text
    • http://gojawufeki.getenjoyment.net/m-audio_fasttrack_pro_driver_mac_os_x_download.pdfIn PDF document text
    • http://sbrf.link/returned_or_has_returnedgqhpn.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462059/normal_602e279dbdb78.pdfIn PDF document text
    • http://loginwithfb.site/vadexopuwlzf.pdfIn PDF document text
    • http://masalev.ru/tafevekek8m6.pdfIn PDF document text
    • http://3bki.ru/13152321319k6l82.pdfIn PDF document text
    • http://pugezesiw.mygamesonline.org/economa_siglo_xix_espaa.pdfIn PDF document text
    • http://everydays.space/98219725149c44z5.pdfIn PDF document text
    • http://dommasters.site/how_to_cook_a_brined_turkey_from_trader_joesu9wgw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://def26600-86c9-4442-a738-094ddf2992d1.filesusr.com/ugd/eb5a6a_175e6de8ca1d41b1a6181e24e5390076.pdf?index=trueIn PDF document text
    • https://1e8c0764-4a0f-46ab-84a2-5f63a8a44928.filesusr.com/ugd/6a0acf_2ae928bf4dd4495eafdd87ee43575013.pdf?index=trueIn PDF document text
    • http://rabatelekovufar.myartsonline.com/27950043359.pdfIn PDF document text
    • http://zedowep.atwebpages.com/crappie_fishing_lures_for_sale.pdfIn PDF document text
    • http://sodowurivav.onlinewebshop.net/79497706509.pdfIn PDF document text
    • https://665985ba-8e9f-4173-b993-17a3090d61d7.filesusr.com/ugd/08421c_ccf97298214c457380a092cd932301a1.pdf?index=trueIn PDF document text
    • https://4b4ea461-5266-411b-8735-d5290551f550.filesusr.com/ugd/7fedcf_5dd52adebd4145128bfb3008299e175b.pdf?index=trueIn 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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f2ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2ED 5132 bytes
SHA-256: d267eb269c6e5232ccf34dc2e24ac6bde2406f2038d00a86223924a492223e3b
font_01_sfnt_off00010463.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10463 11460 bytes
SHA-256: 31e2491cc644308883cb701092d5e85d8622d814f71f7d0b563768556aa97fec
font_02_sfnt_off00012b6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B6F 16076 bytes
SHA-256: 1882111c93182885355c326966aa8b929451d516289c4c69bffbc3e8f6f639a9