Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a994b86b1b274b4…

MALICIOUS

PDF

55.9 KB Created: 2020-10-02 01:02:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: b654aee68e10d5f7ec0bdd1a08a02ed1 SHA-1: b9cdf0ae05f45659f355e798007027ed3f651a5e SHA-256: 8a994b86b1b274b444da430ea5b2275014eb2d9b77ccd43cd96a3eb82efd5053
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://gettraff.ru/strik?keyword=sue%25C3%25B1o+de+una+noche+de+verano+shakespeare In PDF document text
    • http://dopazotol.cangodwriteabook.com/uploads/1/3/1/3/131380467/zabaniranimoba.pdfIn PDF document text
    • http://mapex.reversogames.com/uploads/1/3/2/7/132740280/nibivebomurakafej.pdfIn PDF document text
    • http://files.nataliekopitzke.com/uploads/1/3/1/3/131383837/zosiwitam.pdfIn PDF document text
    • https://site-1039564.mozfiles.com/files/1039564/31471166153.pdfIn PDF document text
    • http://nipesebo.nalcbranch489.com/uploads/1/3/0/8/130813765/wilidagisex.pdfIn PDF document text
    • http://files.adagevpa.com/uploads/1/3/0/9/130969368/5b58e2ec48da90.pdfIn PDF document text
    • http://favag.equinecountryusa.com/uploads/1/3/1/0/131070109/f2c77d7.pdfIn PDF document text
    • http://sidob.beadsnbottlecaps.com/uploads/1/3/0/9/130969027/xapulubokuwuza.pdfIn PDF document text
    • http://nizib.truevinelifetab.com/uploads/1/3/0/9/130969744/resegose-devoxes.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/1/0482/5366/5442/files/share_tea_menu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9314/8313/files/nubofejebesamejiki.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/7374/7609/files/89294159208.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3672/0798/files/1_def_fire_cape_guide_osrs.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6404/2396/files/mass_effect_3_banshees_are_overpowered.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_off00007e02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E02 5568 bytes
SHA-256: 483f38b808536e6a2287a3746d48dde728919e28a15c98008d36878b1ede90bb
font_01_sfnt_off000090ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x90AC 11512 bytes
SHA-256: 4d2d21ef9332e75a2834147d288fbf0ad1ed86a28d5cc16806a6c76c838153a5
font_02_sfnt_off0000b65d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB65D 17448 bytes
SHA-256: b0261e8010f058c8b4ebcf0f3db3a0d48f959f21c481d2205f6796882711cdb6