Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8ec88766bb04769…

MALICIOUS

PDF

41.5 KB Created: 2020-10-09 01:57:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: a5b592cfa041dbef55a31805c0307bcb SHA-1: e29106b32b7e8723007416341a870f8632dc7291 SHA-256: a8ec88766bb047695a53217bdd34e125d8e7d89a30aec41c9d9440eed9b37f3c
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=water+homunculus+build In PDF document text
    • https://site-1036832.mozfiles.com/files/1036832/36661898129.pdfIn PDF document text
    • https://site-1048221.mozfiles.com/files/1048221/49343529105.pdfIn PDF document text
    • https://site-1039861.mozfiles.com/files/1039861/14816935647.pdfIn PDF document text
    • https://site-1037022.mozfiles.com/files/1037022/kegoxeg.pdfIn PDF document text
    • https://site-1037079.mozfiles.com/files/1037079/37195832686.pdfIn PDF document text
    • https://site-1036826.mozfiles.com/files/1036826/78009028566.pdfIn PDF document text
    • https://site-1044018.mozfiles.com/files/1044018/64818760159.pdfIn PDF document text
    • http://files.johnknoxhouston.org/uploads/1/3/1/6/131636689/nozowo.pdfIn PDF document text
    • http://files.nvgws.com/uploads/1/3/2/8/132815752/ropuzovigiradoli.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/997f5ab3-982f-4068-ad4c-ba717ba9a0d7/jopogulufusoruju.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9bfcea64-852a-4241-9e3d-c90b18ec7aa7/54996548621.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3dc433ca-b04c-432a-ac34-a98a6deb55db/gepewup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/262979e0-ef86-49b6-b9bf-9e14c6b6d534/jawedako.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ae8ac0a9-0446-4ed4-9b93-e9a43f97a431/jagenofadunukelafi.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006498.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6498 5332 bytes
SHA-256: 9675d21ac6f2b034b7f0bdac2cf382f96d7af04327933450705d726412e67f3e
font_01_sfnt_off00007693.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7693 10164 bytes
SHA-256: 053093173a50e832f10c9746d4428ee5e8b9ee85afa4cd83b867f003850b96d9

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