Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7022f98b63b35c9…

MALICIOUS

PDF

79.1 KB Created: 2021-05-15 02:45:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 2add77cb41dd8c706c13608df14a5139 SHA-1: 50ccbfa6a22cb456a43fd883e0f7e0a494b3554d SHA-256: e7022f98b63b35c9fd42efb26c00c09c6388a69f833cd53d79ee30088a6e80d9
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 0.9996

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://ponafet.ru/strik?utm_term=ethernet+patch+cable+color+code PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4501791/normal_601e714b79901.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452834/normal_5fcd202bdc0ef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482872/normal_60487076e78f9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403537/normal_602984934110e.pdfIn PDF document text
    • http://tixaman.scienceontheweb.net/twinkle_twinkle_little_star_guitar_tab.pdfIn PDF document text
    • http://wopedejani.iblogger.org/abigail_adams_biography.pdfIn PDF document text
    • http://rigoditibalun.mywebcommunity.org/pdf_carburateur_walbro.pdfIn PDF document text
    • http://tefotofunuwugan.iblogger.org/nutoxosamusobofomabiz.pdfIn PDF document text
    • http://wekanisa.scienceontheweb.net/13229610590.pdfIn PDF document text
    • http://rafupofamurawaf.mygamesonline.org/the_five_canons_of_rhetoric.pdfIn PDF document text
    • http://zizodoroluxonaf.sportsontheweb.net/kipejizorutaxejemusunixo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://roxigivakupumun.epizy.com/61884188663.pdfIn PDF document text
    • http://zeroxezubanalil.onlinewebshop.net/propiedades_fisicas_quimicas_y_biologicas_de_los_materiales_dentales.pdfIn PDF document text
    • http://kopurelotalad.onlinewebshop.net/17110120308.pdfIn PDF document text
    • http://wenulusevikofa.myartsonline.com/botaxozijerina.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8b977381-e1bb-4399-8b7f-f696a6b54642/32777095257.pdfIn PDF document text
    • http://xigufogadenake.epizy.com/what_is_ap_style_in_writing.pdfIn PDF document text
    • http://miluzokawefiru.rf.gd/novel_drug_delivery_system_review_article.pdfIn PDF document text
    • http://tuminexozuvino.atwebpages.com/20516544725.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e93c7d22-fa47-46bd-b911-e568e7c41e36/alexander_hamilton_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e9d78c7-cb53-4731-943b-b4e5be60629e/air_force_one_cast_members.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB16 4820 bytes
SHA-256: 1e70be7dee0e0f1ffe23e01203d53cb60a982169be955f315fe7f439a4689b72
font_01_sfnt_off0000fb52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB52 10924 bytes
SHA-256: 67d1aee301807c0dc077c19c5215089d1ce588bfcff51ae72f48d5e18106b1ff
font_02_sfnt_off000120ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120AB 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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