Malicious PDF — malware analysis report

Static analysis result for SHA-256 a241cb65cca9a8f6…

MALICIOUS

PDF

51.0 KB Created: 2020-10-28 06:06:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: ad9c4b607d16d349ee735c2da94ea600 SHA-1: 28aff4f5d495b1f373553592844069be721f27aa SHA-256: a241cb65cca9a8f67d34126d5088f414ab65bcdfdf23ca1e39713d29aee377f5
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • 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.
  • 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/pify?keyword=tempted+house+of+night+pdf+free+download In PDF document text
    • https://lisevududotuwak.weebly.com/uploads/1/3/4/2/134265384/7426857.pdfIn PDF document text
    • https://wujibinofowe.weebly.com/uploads/1/3/1/3/131383737/dovirewelafoni_kepuk_kepuxelam.pdfIn PDF document text
    • https://fenivubad.weebly.com/uploads/1/3/4/4/134482284/vipevel.pdfIn PDF document text
    • https://jawasolasazilem.weebly.com/uploads/1/3/1/3/131379174/d1ee3c84.pdfIn PDF document text
    • https://zoxetojasag.weebly.com/uploads/1/3/1/4/131437223/nuxogutokiku-jodowipune-rigifukesawosud-jasexizob.pdfIn PDF document text
    • https://gavawujag.weebly.com/uploads/1/3/4/3/134370084/8f9f6156.pdfIn PDF document text
    • https://pevinuwipe.weebly.com/uploads/1/3/0/8/130873962/masipumodolov-kutizexobuzu-vepuremoj.pdfIn PDF document text
    • https://jiwepurojal.weebly.com/uploads/1/3/0/7/130775762/jezutisokezofu.pdfIn PDF document text
    • https://febukorev.weebly.com/uploads/1/3/4/3/134325382/bisuguxuzewumuzube.pdfIn PDF document text
    • https://kemumapuvepuvi.weebly.com/uploads/1/3/4/3/134311950/9151190.pdfIn PDF document text
    • https://jubunukaf.weebly.com/uploads/1/3/1/4/131483214/lelemoduzig_sozabimigira_pegapatok.pdfIn PDF document text
    • https://sixapinipuso.weebly.com/uploads/1/3/1/3/131384402/manimime_logovekataki_razuripilipoxoj.pdfIn PDF document text
    • https://bovaromekefa.weebly.com/uploads/1/3/4/4/134403346/karipu_tamigejafinigax_wewikukezug.pdfIn PDF document text
    • https://datirelegewewat.weebly.com/uploads/1/3/4/3/134329883/genojokitunovetug.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off000070f1.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off000070f1.bin)
    • https://uploads.strikinglycdn.com/files/09b5e7f4-1160-485c-b844-6fffe1a83c77/45727346641.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a797194c-7713-441c-b3fa-87f1f2a61c3b/hands_on_machine_learning_with_scikit-learn_and_tensorflow_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d333b7ac-a9c9-4817-9fe5-a9cbd6ed24f1/kaduz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7835b37b-a20b-4f54-a071-6018f7e245da/satudad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b4c3c56-a3e6-43a1-b3dd-c95833c4ee83/pokemon_heartgold_rom_fr.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/deb2e768-d599-4c50-9303-ce25797e7d8e/zumeg.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 extracted file (font_00_sfnt_off000070f1.bin)
    • http://dejavu.sourceforge.netIn extracted file (font_02_sfnt_off0000a7af.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (font_02_sfnt_off0000a7af.bin)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000070f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x70F1 5496 bytes
SHA-256: 4457faaf13557aa0328c4154995957eee36e06ccd22bf778367024675f05e31a
font_01_sfnt_off00008393.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8393 10540 bytes
SHA-256: ddd9b6beac188cd517257bf448b15d47187b64eba561a1dee7e85fa7b8b2107e
font_02_sfnt_off0000a7af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA7AF 16132 bytes
SHA-256: 6f1ff871cf6f8a11a72652b45576c366cdb39a1ef29e9eb747fa7a572d777da9