Malicious PDF — malware analysis report

Static analysis result for SHA-256 53e5a1a605a40e0a…

MALICIOUS

PDF

68.7 KB Created: 2020-11-01 06:05:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 0522bd329cc1ef72b7b864f44e5f12a3 SHA-1: d9f4ca68fc2e4df39c2f62c0826cac087f7f46f7 SHA-256: 53e5a1a605a40e0a59e12428d8cae731fbb2be67198d0bae6b4bfdccb84c4b97
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous links to external websites, including a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'National association of veterans program administrators' and a URL that appears to be a lure. The presence of many PDF links suggests an attempt to farm traffic or distribute further malicious content.

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/aws?keyword=national+association+of+veterans+program+administrators In PDF document text
    • https://votuwokikinoso.weebly.com/uploads/1/3/4/4/134466575/vemejep.pdfIn PDF document text
    • https://sopopubepomexak.weebly.com/uploads/1/3/4/2/134265445/9f22dce77383ac6.pdfIn PDF document text
    • https://vewutaniwem.weebly.com/uploads/1/3/0/8/130873717/fd026ff.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/wotodedaruzuk/7618446060.pdfIn PDF document text
    • https://s3.amazonaws.com/gonuxiwela/lobexebawefoxapebokiv.pdfIn PDF document text
    • https://s3.amazonaws.com/paropabaru/67948969214.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/tenob.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/lopovemufurivomuvexale.pdfIn PDF document text
    • https://s3.amazonaws.com/jipowumat/20869147576.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5b5c777a-a56c-447f-bacf-4b37d680a99e/80172492606.pdfIn PDF document text
    • https://s3.amazonaws.com/memul/turkish_arabic_dictionary_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/30b0340e-67ce-46f9-8672-69a7ac62cb1a/10287398801.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/4346/2561/files/zip_files_opener_for_android.pdfIn PDF document text
    • https://s3.amazonaws.com/dinisemowoge/44413232152.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/8947/0643/files/bifirinuzipetexejunizexut.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_off0000ce8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE8C 5504 bytes
SHA-256: 3aa7f58389be5b627a7a076113573682694d2aa38017d40bb2f9167bdaa21959
font_01_sfnt_off0000e13f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE13F 10436 bytes
SHA-256: ed421a23d5369b180ee261e04fa90378108ed45f20fccd4e9f75deeface7d9fc

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