Malicious PDF — malware analysis report

Static analysis result for SHA-256 96639c16eb8db091…

MALICIOUS

PDF

44.1 KB Created: 2020-10-25 23:46:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 34facde0b38ce599a36ffed16ba3022a SHA-1: d7c3853772a9c655f749da75f496f3ec17360fd5 SHA-256: 96639c16eb8db09107121d5ff2a3358d9cd6d56e2a9c416396c1f28488369696
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=audit+methodology+pdf In PDF document text
    • https://melegejisud.weebly.com/uploads/1/3/1/3/131379421/25693309391f5.pdfIn PDF document text
    • https://xesaranit.weebly.com/uploads/1/3/2/6/132696194/31790e112d.pdfIn PDF document text
    • https://viweposedijul.weebly.com/uploads/1/3/1/0/131070314/bevofofiripon.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/7971455.pdfIn PDF document text
    • https://vupimolafi.weebly.com/uploads/1/3/1/3/131398504/a2735e31.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/4798140.pdfIn PDF document text
    • https://goduvozimaku.weebly.com/uploads/1/3/1/3/131380582/zogafa.pdfIn PDF document text
    • https://xigeworimejol.weebly.com/uploads/1/3/1/4/131483719/8920202.pdfIn PDF document text
    • https://jopalezaleloloj.weebly.com/uploads/1/3/1/3/131380469/rulawigusiravibo.pdfIn PDF document text
    • https://tenikekiso.weebly.com/uploads/1/3/0/7/130775729/85edd96af.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388432/normal_5f9185c6ee2ef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380522/normal_5f8c39f081676.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408719/normal_5f94947959087.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/fdd56e4f-f6b1-47af-882c-7d0455f3fabd/36916734334.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/34379479-2d40-4f46-a748-4146184af890/83263000196.pdfIn PDF document text
    • https://s3.amazonaws.com/jasadavebaga/sepsis_3_guidelines_2016.pdfIn PDF document text
    • https://s3.amazonaws.com/gapivegek/cantonese_learning.pdfIn PDF document text
    • https://s3.amazonaws.com/subud/lolovaperuzatuvotiruz.pdfIn PDF document text
    • https://s3.amazonaws.com/gupuso/simuzifobinumejak.pdfIn PDF document text
    • https://s3.amazonaws.com/jamokaroxoj/accounting_staff_duties_and_responsibilities.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/zona_saer_beatriz_sarlo.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/nadazaburusurotapuv.pdfIn PDF document text
    • https://s3.amazonaws.com/jadere/indian_breakfast_recipes_download.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_off00007130.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7130 5064 bytes
SHA-256: c2040e3547c63478c76a3805e73969bdf6a8c918ff5e6c4492f555907366d5ff
font_01_sfnt_off00008260.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8260 9692 bytes
SHA-256: 823611c08f5c3be2bc0f67d034145cf272ad311aba3d89b03a5f544cbc98a227

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