Malicious PDF — malware analysis report

Static analysis result for SHA-256 53285bdc9aed07c0…

MALICIOUS

PDF

47.9 KB Created: 2020-10-06 20:56:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: 8e59efeb6a904bc7b35b12d9635101cf SHA-1: 60978051f3596c70f21a4c1c314a02d7acb36ddb SHA-256: 53285bdc9aed07c0399990b010ca1f89a99eabf30394f9bf1e2e0840f97598df
132 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 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://cctraff.ru/strik?keyword=total+war+warhammer+2+free+download In PDF document text
    • https://site-1039583.mozfiles.com/files/1039583/77605503699.pdfIn PDF document text
    • https://site-1037848.mozfiles.com/files/1037848/zagexemawutejawijor.pdfIn PDF document text
    • https://site-1040124.mozfiles.com/files/1040124/samazazibuxi.pdfIn PDF document text
    • https://site-1036791.mozfiles.com/files/1036791/85693728914.pdfIn PDF document text
    • https://site-1036655.mozfiles.com/files/1036655/51403956258.pdfIn PDF document text
    • https://site-1040595.mozfiles.com/files/1040595/1884405912.pdfIn PDF document text
    • https://site-1038531.mozfiles.com/files/1038531/fulep.pdfIn PDF document text
    • https://site-1037273.mozfiles.com/files/1037273/86018919748.pdfIn PDF document text
    • https://site-1037019.mozfiles.com/files/1037019/makarupatedenufevefidul.pdfIn PDF document text
    • https://site-1048576.mozfiles.com/files/1048576/pufeliwebidigepezojug.pdfIn PDF document text
    • https://site-1036685.mozfiles.com/files/1036685/gekekojapezugakepiwelila.pdfIn PDF document text
    • http://vowoviw.helpingusgrow.org/uploads/1/3/2/8/132814241/divupetusoxija.pdfIn PDF document text
    • http://files.voicescienceworks.org/uploads/1/3/1/4/131409884/21f3fc61662.pdfIn PDF document text
    • http://wuwego.normanmuseum.org/uploads/1/3/1/3/131380828/4d573fef8.pdfIn PDF document text
    • http://zogale.vhca.info/uploads/1/3/0/8/130814328/jizuzan.pdfIn PDF document text
    • http://files.newwineintl.org/uploads/1/3/1/8/131857193/5274806.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000734f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x734F 5140 bytes
SHA-256: 0b44b8cf2b467678df329d0ddfada1493b008a44535a27381f2d20476b34a159
font_01_sfnt_off000084ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84AB 1800 bytes
SHA-256: e9a5a1f6ed95b1e3669933bb00002ad32a1708c3e0b735191cad5e02368a6c7d
font_02_sfnt_off00008d39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D39 10936 bytes
SHA-256: c3daba797a4fe8648f897140d93c8f3bde84b93c40696a7297a6ffb43a748f0b