Malicious PDF — malware analysis report

Static analysis result for SHA-256 2748932daf454985…

MALICIOUS

PDF

60.6 KB Created: 2020-10-06 10:44:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: bdd3bb83ea25956c54ccde1fbd425898 SHA-1: 53a437d4b66bbb52c3ab6cbb84afeecfaf056455 SHA-256: 2748932daf4549850a9da6cfa288d876df4aa2532b1c83dc8b62139b88aa6204
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=the+secret+world+of+arrietty+eng+sub In PDF document text
    • http://files.emilyrosenaturephoto.com/uploads/1/3/1/3/131381144/b46c80b1400.pdfIn PDF document text
    • http://voxazazug.nadiaballan.com/uploads/1/3/1/1/131164250/963522bf46.pdfIn PDF document text
    • http://files.hairrazzors.com/uploads/1/3/1/4/131406403/b572dc1a329.pdfIn PDF document text
    • http://files.chinapivotsource.com/uploads/1/3/0/7/130776728/3768861.pdfIn PDF document text
    • http://fomowa.operationglobalfreedom.com/uploads/1/3/0/7/130774977/7ed3c1.pdfIn PDF document text
    • https://site-1036716.mozfiles.com/files/1036716/31969168050.pdfIn PDF document text
    • https://site-1036652.mozfiles.com/files/1036652/delipolibuxapemosadod.pdfIn PDF document text
    • https://site-1038363.mozfiles.com/files/1038363/gexavejaluropevijupetirev.pdfIn PDF document text
    • https://site-1036636.mozfiles.com/files/1036636/jaraxumikag.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/083df3da-70c5-401b-813d-a6a94e278ae0/lutololedareg.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/29e3eb5e-5e3e-4387-90f6-e49c7453a754/73307684392.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed3957d7-bde5-4007-864d-659c97c4f717/74542437270.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/160eac93-a677-4189-9666-608685dddd00/33366761913.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f0dc6f2-63a3-44a2-b070-79feea3e2d26/doroj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a998fef-a4c4-477f-aac1-ee2bde280d5e/15835733453.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b187b49f-30f1-49c8-b0f6-103a31c109f9/feburusevepaf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b7f014a3-67b6-4971-9e3b-9b0be135a172/73133137249.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/23fc909d-ff8f-4268-9024-5d1b91413db0/sisolosutewevarog.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/01af10a6-d67c-43ce-9595-7565ebe9e23c/79358976536.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009060.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9060 4936 bytes
SHA-256: f9c896c145e229d42801a57b2831f83ac9c94eb6f4f190aef373e5b0f53016e4
font_01_sfnt_off0000a1bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA1BF 5568 bytes
SHA-256: 71aec1166fe16f0dea64c57e1f852802cb285fe0a27098a6b49183002d11363a
font_02_sfnt_off0000b4c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB4C1 15504 bytes
SHA-256: 446f951acda28a1bb8238623c7614b750db5dd1a0a21d7c6129a675e329daa4c

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