Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a96620f0e056a91…

MALICIOUS

PDF

43.0 KB Created: 2020-10-09 03:42:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 72f3580ef606761373575adb6cd99d52 SHA-1: abe2d4919a0383aebc3368f34faa8972e9766678 SHA-256: 3a96620f0e056a910318df1ec7831b36f45455b98d54ebd7e75c546bbf34d010
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/strik?keyword=tzimisce+vampire+the+masquerade In PDF document text
    • http://dupeli.zimgamewerks.com/uploads/1/3/1/8/131857966/nuwogovijiz-gelaxakuxegel-xikukekoputu.pdfIn PDF document text
    • http://zatej.jademaxx.com/uploads/1/3/1/0/131071145/7054208.pdfIn PDF document text
    • http://zewaluba.elmirabaptistchurch.com/uploads/1/3/1/4/131406686/ccc876f1.pdfIn PDF document text
    • http://files.youngsickndangerous.com/uploads/1/3/0/7/130775897/571370.pdfIn PDF document text
    • http://gemuvij.sandieboxerkennel.com/uploads/1/3/0/8/130813834/570568.pdfIn PDF document text
    • https://site-1040562.mozfiles.com/files/1040562/tufujuxudabumidopine.pdfIn PDF document text
    • https://site-1040568.mozfiles.com/files/1040568/17681060732.pdfIn PDF document text
    • https://site-1036779.mozfiles.com/files/1036779/94875502876.pdfIn PDF document text
    • https://site-1041284.mozfiles.com/files/1041284/78581558248.pdfIn PDF document text
    • https://site-1036818.mozfiles.com/files/1036818/9346162174.pdfIn PDF document text
    • https://site-1037022.mozfiles.com/files/1037022/nurepokejimokaviwazemase.pdfIn PDF document text
    • https://site-1038919.mozfiles.com/files/1038919/88334060569.pdfIn PDF document text
    • https://site-1039903.mozfiles.com/files/1039903/3614801873.pdfIn PDF document text
    • https://site-1038478.mozfiles.com/files/1038478/tonofomigavalatedo.pdfIn PDF document text
    • https://site-1037157.mozfiles.com/files/1037157/49373003489.pdfIn PDF document text
    • https://site-1036699.mozfiles.com/files/1036699/61523333078.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006723.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6723 5464 bytes
SHA-256: 9a86067b30f796828bff57b193ce250d84c55a1889203155d1644bf29f0d381f
font_01_sfnt_off00007999.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7999 11132 bytes
SHA-256: 0ff952e85c5ec2040ce29febc307f4be480f91458ade1361772b524517dbf7fc

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