Malicious PDF — malware analysis report

Static analysis result for SHA-256 b18dd2387765c916…

MALICIOUS

PDF

42.5 KB Created: 2020-10-15 12:42:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 05e4649a60f3b275b4d24234ada573b7 SHA-1: e9e5abfa52fcfb90d72f30a7a902d95500a214db SHA-256: b18dd2387765c916b827e0519e6aa0d8c79948078a8d1e3be66118cdb1f1df3a
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=auctionator+wow+addon+guide In PDF document text
    • https://site-1038729.mozfiles.com/files/1038729/88954027603.pdfIn PDF document text
    • https://site-1037055.mozfiles.com/files/1037055/sosivelagozafugi.pdfIn PDF document text
    • https://site-1040327.mozfiles.com/files/1040327/rovadepexevabafufufuvuk.pdfIn PDF document text
    • https://site-1037096.mozfiles.com/files/1037096/18258550291.pdfIn PDF document text
    • https://site-1040504.mozfiles.com/files/1040504/wadesidemekevabajalefep.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/72570fe67e8.pdfIn PDF document text
    • https://guwomenod.weebly.com/uploads/1/3/0/8/130873843/belapigojat.pdfIn PDF document text
    • https://kenilajapa.weebly.com/uploads/1/3/1/0/131069910/764342.pdfIn PDF document text
    • https://wonigebegi.weebly.com/uploads/1/3/1/6/131606731/ca3f2.pdfIn PDF document text
    • https://lajojixuvoporor.weebly.com/uploads/1/3/0/7/130738555/715169.pdfIn PDF document text
    • https://site-1039430.mozfiles.com/files/1039430/42855022359.pdfIn PDF document text
    • https://site-1036761.mozfiles.com/files/1036761/14096443389.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/8b88133b-7b7e-4769-8e3b-c64d58e2c905/13277490988.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1dd9091d-3079-478c-893f-728658b4ffb9/8846604832.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/59d4d7fb-f475-4d84-9fec-60ab1ad83160/63725189691.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/786ad4a1-9038-47b5-868a-458db88be851/41702970883.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/383c4651-04f7-4748-9c82-a4b64c01ff72/fawuzojikevibi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/86bc2f0d-9b00-4d94-85bc-1e5e34c2de06/51680653532.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a6e0e77d-6e83-4889-b309-a2c9d3da58d3/kikuzozobazux.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006850.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6850 4980 bytes
SHA-256: 8f53dc287d21bdbe289d31a9dc32de47cfd02efbb11e2c8c5799cb8c92852e13
font_01_sfnt_off00007955.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7955 10532 bytes
SHA-256: 1998156228a46837f3b924920530c4fd383209f2ecb6303d281db343a390e60d

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