Malicious PDF — malware analysis report

Static analysis result for SHA-256 2db605b3014c0f2d…

MALICIOUS

PDF

57.8 KB Created: 2020-11-01 05:37:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 129bd3945e1cb81dd4ef4e208e16ed3f SHA-1: 92613908bfd54091211b9d68ca7978b025026687 SHA-256: 2db605b3014c0f2d23d1a31783e8f17f3459b383c5ae2a89b51a845bf951ec51
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

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/aws?keyword=velimir+khlebnikov+poetry In PDF document text
    • https://rofuvawe.weebly.com/uploads/1/3/4/3/134363923/6ec31b9d99.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366324/normal_5f89d33819248.pdfIn PDF document text
    • https://tivakoxidedopa.weebly.com/uploads/1/3/0/7/130776298/6556261.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382406/normal_5f9868457a0e2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393632/normal_5f9e0a0d6e4a1.pdfIn PDF document text
    • https://nuzaguwimera.weebly.com/uploads/1/3/4/4/134492670/fusadedenepuzedox.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381766/normal_5f8ef41cb578e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371787/normal_5f8f79a763079.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/3966/0458/files/faridesivijozalezure.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e43b2ef7-8129-492b-b02d-f8727583976a/32762504123.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0493/1403/7919/files/50239089303.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/afeb6926-7ad6-49af-a4d3-94c7adc94597/56472277195.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7afab088-f112-41f1-b29b-5e30153457e8/dijikusolakexogakej.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/2772/5995/files/62672842799.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off0000af1d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xAF1D 25028 bytes
SHA-256: 79c767de44a1a7552f1a69da90590fc6ecd06e7b02ada955ee5f0b362e1b7424
font_00_sfnt_off0000760d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x760D 5000 bytes
SHA-256: 76669738acf8db12e690f7e58733910c969dfa39d273ba9de4edf65b62d5d7e4
font_01_sfnt_off000086f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x86F1 12100 bytes
SHA-256: 9dde653daf7033fa7e21d22996e819c0a7e55810cdf55986ad47be291a7f318c

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