Malicious PDF — malware analysis report

Static analysis result for SHA-256 587c914b0001d178…

MALICIOUS

PDF

36.5 KB Created: 2020-11-05 08:32:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: bb7390b48025b7087df9ba0c41bf6cd0 SHA-1: 2d0efcd2666d052eab878e0be610ec6ff8eaa667 SHA-256: 587c914b0001d178eec29a4c13fe80b82485a751d763682dea2a7093e925dc31
154 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one identified as a malicious redirector. The ML classifier strongly flagged this PDF as malicious, and the presence of numerous external links suggests an attempt to lure users to potentially harmful content. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a phishing or redirection attack.

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://gettraff.ru/123?keyword=wk+34+2020 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4369501/normal_5fa10b8b1c10a.pdfIn PDF document text
    • https://bupiwuzisulim.weebly.com/uploads/1/3/0/8/130874125/e7ec98a008.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369522/normal_5f87ff5686885.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410206/normal_5f9742bf1cea2.pdfIn PDF document text
    • https://xenolonaloku.weebly.com/uploads/1/3/4/4/134458783/wupijinokib-pavogomileta-bowizupixo-zalemenosixuv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393489/normal_5f9c0aa241d61.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366331/normal_5f88b5158d7b8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366018/normal_5fa33e37e0024.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374835/normal_5f91c4beabe25.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366405/normal_5f9602ce44466.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366000/normal_5f90ab2f2e8ef.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/6640735703.pdfIn PDF document text
    • https://s3.amazonaws.com/juzinaramip/80263201089.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/bennett_s_cardiac_arrhythmias.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c78ff77c-8793-4f2a-8fa0-e4ebe6c4559c/35423849404.pdfIn PDF document text
    • https://s3.amazonaws.com/sedimeraxufi/mixasemogurevi.pdfIn PDF document text
    • https://s3.amazonaws.com/senodiw/tixexerot.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_off00004e1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4E1A 4764 bytes
SHA-256: 851b6ace71f8746057f86212a7755be4d2143f3aa7ee01ba6da489e0637eca24
font_01_sfnt_off00005e8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E8D 11400 bytes
SHA-256: df46e54179d28338e453f0b5edca59a52665138664c55515c15e900fda4ce81d

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