Malicious PDF — malware analysis report

Static analysis result for SHA-256 71c02ebbf05e7e5d…

MALICIOUS

PDF

53.6 KB Created: 2020-10-25 13:11:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: f11e629c44a63221e8672c75a71edbdb SHA-1: d792f9c768e66be61f8dcb131c0806172b718005 SHA-256: 71c02ebbf05e7e5d25527d72b07097e57562abfa3a2af0abbb5aa2d1921dada1
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

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

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://cctraff.ru/strik?keyword=h2o+just+add+water+full+movie+cast In PDF document text
    • https://ponopuxebi.weebly.com/uploads/1/3/4/3/134365602/filudonidek_zivurafisabiki.pdfIn PDF document text
    • https://vopevejefed.weebly.com/uploads/1/3/1/6/131606133/pakifupegorowa-zarawirenedofad-kokam-rebosukesure.pdfIn PDF document text
    • https://gumomamomav.weebly.com/uploads/1/3/1/3/131398069/f6e13c0e3f039.pdfIn PDF document text
    • https://narogigadi.weebly.com/uploads/1/3/0/8/130874066/detoralubabutusux.pdfIn PDF document text
    • https://rimosuvifakub.weebly.com/uploads/1/3/4/3/134310068/newek.pdfIn PDF document text
    • https://bizumoku.weebly.com/uploads/1/3/2/6/132681494/sujezuvawuzu.pdfIn PDF document text
    • https://dimaxafazeza.weebly.com/uploads/1/3/1/4/131453031/tekidotobup.pdfIn PDF document text
    • https://zoxuzuxebexot.weebly.com/uploads/1/3/0/9/130969059/pokobu-pidoror-pekirez.pdfIn PDF document text
    • https://latenenagizogip.weebly.com/uploads/1/3/2/6/132696064/8002127.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/9808/8628/files/vocabolario_croato_italiano.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/3104/7577/files/nosobilazu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6773/6225/files/nagaland_state_lottery_evening.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/6662/4666/files/pasoliragebo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/6340/2392/files/combined_arms_breach_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/7973/8567/files/the_idiot_brain.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/6875/4594/files/uk_satellite_dish_size_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/1242/6397/files/49065249106.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files/xavisigepetexa.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/43485745154.pdfIn PDF document text
    • https://s3.amazonaws.com/jajoxulabojaso/vifisepegozufujisoro.pdfIn PDF document text
    • https://s3.amazonaws.com/wegemebufojafak/emotional_intelligence_quiz.pdfIn PDF document text
    • https://s3.amazonaws.com/sugowubuf/l_afficheur_lcd.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
    • 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_off0000789f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x789F 5488 bytes
SHA-256: 95c040242c1743f35130a5afd9f858d08d66c77b3d9fed8d5f4ef92054d23607
font_01_sfnt_off00008b48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B48 10616 bytes
SHA-256: 5330a6becf4de730cd9abd42d62ebfd7c8fc9eab2e509ad51fdc3294edc285c8
font_02_sfnt_off0000afe3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAFE3 16924 bytes
SHA-256: 6707fe2711b8c63e24d82d96660c48a127736752a64a580c832bae0c2101bcdb

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