Malicious PDF — malware analysis report

Static analysis result for SHA-256 a45356627707fb74…

MALICIOUS

PDF

58.4 KB Created: 2020-10-14 06:59:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: a82401fc1a1832fd7c8e86f27027574d SHA-1: e17c4bbece219b861590aeb9bad0dff9f1cff38f SHA-256: a45356627707fb74ae3c5bbd1dc5b24de047f720774979c7192b52b0091adf5d
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous embedded links, identified as a link farm, with a primary redirector pointing to a known malicious URL. The ML classifier also flagged this PDF with high confidence. While no scripts were explicitly extracted, the nature of the embedded links suggests an attempt to direct users to malicious content, likely for SEO spam or phishing purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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://ggtraff.ru/strik?keyword=workouts+to+lose+weight+pdf In PDF document text
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/6069273.pdfIn PDF document text
    • https://genigudepa.weebly.com/uploads/1/3/1/0/131070712/6023986.pdfIn PDF document text
    • https://fijojonibiw.weebly.com/uploads/1/3/2/6/132681787/rotizizalipi-xulejowo-wegevok-xutijub.pdfIn PDF document text
    • https://keniwuki.weebly.com/uploads/1/3/1/4/131483234/5d6f2da.pdfIn PDF document text
    • https://gimejexoxixaza.weebly.com/uploads/1/3/1/8/131872185/e5bcd2697.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/952727cd-d3af-4667-9fda-66f724016871/21205083215.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aea44b10-a431-4d95-943e-140bebb69a9a/89739247656.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ba9d6bb5-4056-4a54-96a0-4ac7891c49bb/42901565208.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb99ec60-f951-40d2-8378-c30c46b2ddd2/puvenitinonidug.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df62ac82-24bb-4d36-8663-3f5182786568/sejipixinirusiwemeso.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ebe56ba8-af31-4b7e-96fe-098030734b87/gumire.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/43e32412-d700-477d-975e-791ebb82f947/zegitodosoxumetoke.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/463d70b4-b750-4ecd-b2af-407838e965cd/lazagajidit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7afaf084-100b-403a-b83d-db7fb32af1e8/keworusazuvajuxus.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_off00009efc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9EFC 5264 bytes
SHA-256: acab452851933c47fa3d76e543715fb331d07375ee436503a714383de1a32f00
font_01_sfnt_off0000b0ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB0FF 14324 bytes
SHA-256: 9e602a7a1e8b31687df16b65aba0050ab8f99295c37edbe31d12828a2e6075bf

Open this report in the interactive analyzer, or submit your own file for analysis.