Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c2d1576aaa4fe97…

MALICIOUS

PDF

51.8 KB Created: 2020-10-05 18:48:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 64d305c471895ce58843eab8d6f53db8 SHA-1: ea06846b81184e09fe897bd725749ea9deb8eb23 SHA-256: 4c2d1576aaa4fe9771281c841970124ff6f200799067c9e6894635f703ec6244
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://ttraff.club/pify?keyword=the+joker+full+movie In PDF document text
    • http://gusof.highlandconservancy.net/uploads/1/3/1/4/131407283/8071879.pdfIn PDF document text
    • http://zovelipa.callthemformeprototype.com/uploads/1/3/2/6/132681556/8684361.pdfIn PDF document text
    • http://xabuf.compositelifters.com/uploads/1/3/0/7/130740118/rososatebojokomepuf.pdfIn PDF document text
    • http://files.psychoslaughterman.com/uploads/1/3/2/6/132695551/f188d107ed3.pdfIn PDF document text
    • http://garirenir.fangirlyarn.com/uploads/1/3/0/8/130814328/vifizusufininituba.pdfIn PDF document text
    • https://site-1037156.mozfiles.com/files/1037156/miloxefuxasitalojusin.pdfIn PDF document text
    • https://site-1037883.mozfiles.com/files/1037883/dapopefavapibupijogenibar.pdfIn PDF document text
    • https://site-1037835.mozfiles.com/files/1037835/34328910112.pdfIn PDF document text
    • http://luhurianstream.xyz/en/movie/475557In 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/ae307f63-d6a7-47e9-a69f-67d4ae43a4c9/keripobi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7feb0235-bc73-4710-837c-7e6a51ce8b85/73903912523.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/06e6832c-b260-4ab4-a66d-df9bff9ca7d9/18679658306.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e755449-abf6-45ef-81c6-a78c21c58569/xejukoduwobej.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a21bb471-15ad-4895-b088-03016a322a4a/85599051274.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/787cbd64-4ce7-472b-aaab-9b7795515756/35596081658.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_off00007355.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7355 4768 bytes
SHA-256: ba57a00ba839a03b7dea4c25277ee89b29e81fc684142e18e7a0febd1768fda2
font_01_sfnt_off0000836a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x836A 12444 bytes
SHA-256: 3c0667253a637c5a3bf8282dcd306e0440fb55b828b2aa0ec5bf141cfd429c4f
font_02_sfnt_off0000abbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xABBD 16064 bytes
SHA-256: 723e6034cfa8adeebabcb44fcd9a81d05c7492831ad3e7dd1a7a87e114838b67

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