Malicious PDF — malware analysis report

Static analysis result for SHA-256 7aaac5f2137fecbc…

MALICIOUS

PDF

50.9 KB Created: 2020-11-07 07:36:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 7d9dae0aadd34164bdf1ee7bce1a30da SHA-1: fa79f441b1b5d6bd690af6f62c2c72e37fc7f60a SHA-256: 7aaac5f2137fecbc61e894bce5ab2667fa897b0ebcf06e8d4fd1debcac900498
192 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://traffmen.ru/aws?keyword=choices+mod+apk+vip In PDF document text
    • https://vuzejugusu.weebly.com/uploads/1/3/4/4/134486163/babimitujamago-zejigaderiletu.pdfIn PDF document text
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/wowabaxisefidet-nikuvajekibesim-napoxalapa.pdfIn PDF document text
    • https://sokuvotaboraj.weebly.com/uploads/1/3/0/7/130776263/rudinaxe.pdfIn PDF document text
    • https://bobejezesolaz.weebly.com/uploads/1/3/4/6/134622741/6fcd3da.pdfIn PDF document text
    • https://vutizimowunofe.weebly.com/uploads/1/3/4/3/134354130/ded14.pdfIn PDF document text
    • https://xukutejupu.weebly.com/uploads/1/3/4/4/134487517/bb8daea4ba8.pdfIn PDF document text
    • https://genigudepa.weebly.com/uploads/1/3/1/0/131070712/runemevurexuziwone.pdfIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://pupirod.files.wordpress.com/2020/11/nozemapopumetuve.pdfIn PDF document text
    • https://s3.amazonaws.com/kovilowab/jafufodotukosikatobu.pdfIn PDF document text
    • https://sebuwisawos.files.wordpress.com/2020/11/fipupojuretis.pdfIn PDF document text
    • https://tazitox.files.wordpress.com/2020/11/sobikazopugevo.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/84855411737.pdfIn PDF document text
    • https://gogajajar.files.wordpress.com/2020/11/48539197016.pdfIn PDF document text
    • https://s3.amazonaws.com/vexeliku/89735365607.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006654.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6654 1696 bytes
SHA-256: 2e3af33663d03ec9a00a2230504bb9e8f98e67bd55fe1d0bcc4ef3f4c4b957b0
font_01_sfnt_off00006e7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E7F 5216 bytes
SHA-256: e833705fc34b27346bea57769c8bdf7747831facb8e8c64df4126bce72da6b61
font_02_sfnt_off00008018.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8018 12276 bytes
SHA-256: 4c87846341c06672c8911d68f1155328cde58bc1c852ce4a242a1539ded0ed08
font_03_sfnt_off0000a93b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA93B 16144 bytes
SHA-256: 0ac7c3374b05c7f503ea1e1306be6d1b38d4f84cef18590183456b3168b0763b