Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ffa2c0b207cbfdf…

MALICIOUS

PDF

73.9 KB Created: 2021-03-23 15:46:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 07fe15a7d5b89f4906bfbf0603959249 SHA-1: 97e575dd27b13bb38fadf1d3d7551e827daddc07 SHA-256: 8ffa2c0b207cbfdf31be7979057c9c89db07bec9730cfd9cdaa0ade31a0d5f6f
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9992

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://fokemale.ru/strik?utm_term=pet+sematary+2020+trailer PDF link annotation
    • https://cdn.sqhk.co/depivuni/BMjijhz/18418240307.pdfIn PDF document text
    • https://cdn.sqhk.co/lumolixuwo/jcifKjf/bronchial_asthma_article.pdfIn PDF document text
    • http://loneresel.mygamesonline.org/61125311481.pdfIn PDF document text
    • http://pajuwepubawip.sportsontheweb.net/53413449521.pdfIn PDF document text
    • http://kurutog.mygamesonline.org/junimadenilakamabaxij.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375207/normal_6044d900dcbb0.pdfIn PDF document text
    • http://pupunorip.getenjoyment.net/tryb_rozkazujcy_angielski_wiczenia_dla_dzieci.pdfIn PDF document text
    • https://sekowuwumobof.weebly.com/uploads/1/3/5/3/135394032/da026bf7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451045/normal_5ff7ff715c933.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452381/normal_60522015bed6a.pdfIn PDF document text
    • http://pezejij.mygamesonline.org/kizuwedidanaxujefona.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372383/normal_5ff281230c605.pdfIn PDF document text
    • https://puralabeno.weebly.com/uploads/1/3/2/8/132814071/fuxalal_rakafamopop_muzes.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404108/normal_60247f1d5d7b0.pdfIn PDF document text
    • https://cdn.sqhk.co/busoleva/Isdhfge/pigakojaxuloboxasaxifor.pdfIn PDF document text
    • http://sovumeriwox.mygamesonline.org/ibps_bank_clerk_syllabus_download.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/a20e0107-0f15-4ee8-801d-8e839f754bf3/87256031930.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb8b9ff0-52f1-48a5-a1c4-e405ddfeaf64/vagofokagimu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/be9b64d2-7302-4c3d-8d76-338ad63ed658/44919832861.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2bca5412-e651-4217-b9d0-4de2ecc65bf3/roxexuwetorubatesuguzen.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd4724bf-6cc4-4689-a84b-d1820df9cc80/21409112073.pdfIn PDF document text
    • http://negumigimewote.onlinewebshop.net/aide_memoire_electricite.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_off0000dfda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFDA 5208 bytes
SHA-256: 75cf005bd33fc658a0e7eebc2d64f0b6a1d6847b142c8bf4476fda8628dd8c08
font_01_sfnt_off0000f177.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF177 12096 bytes
SHA-256: 3e9dfb8f135b5b1c29740117c948331e84447bab27386a929165514cfacfd786

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