Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e168af95e810060…

MALICIOUS

PDF

71.8 KB Created: 2021-03-27 18:45:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 1b422eb83f6ca1ea706f8432fcaf4f69 SHA-1: 2de098cb435f87f41c7b0a136f901914c8b8d5ba SHA-256: 1e168af95e810060c7dc397e0dd8b2af16968498646dc119a2b63225ca2ab6ce
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://bologen.ru/award?keyword=ashish+arora+physics+pdf PDF link annotation
    • https://jinokafolamod.weebly.com/uploads/1/3/4/3/134310646/dojejexasupafoz-vatuwabuk-bozujewa-banilidusetazab.pdfIn PDF document text
    • https://pozalifutasor.weebly.com/uploads/1/3/5/3/135325459/wagidakos_xelalepetonag.pdfIn PDF document text
    • http://thecet.xyz/39073113013mmx3w.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378152/normal_6023708bde4dd.pdfIn PDF document text
    • https://jawonuvanez.weebly.com/uploads/1/3/6/0/136021807/8687842.pdfIn PDF document text
    • http://creditscoreusa.info/xojakopixetemilovegoz3k1xe.pdfIn PDF document text
    • https://fezuxikazosulav.weebly.com/uploads/1/3/1/3/131398093/zixekaxojol.pdfIn PDF document text
    • https://buweselaxe.weebly.com/uploads/1/3/0/9/130969446/poxapeb.pdfIn PDF document text
    • http://sosefuxewaduta.iblogger.org/3531544531.pdfIn PDF document text
    • http://iciko.xyz/72867803675gk0ky.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379852/normal_5ff7c3d5b4045.pdfIn PDF document text
    • http://ch-redirect.icu/695751103125w5ju.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://fa5d8e44-005d-4c05-925d-ba60cb7f5023.filesusr.com/ugd/121e37_dbe73cf533ec4d27976de776e028f390.pdf?index=trueIn PDF document text
    • https://a5a7f18c-b887-48a0-80cc-3627c14345d5.filesusr.com/ugd/609f59_8bf66a6a0e214132b80e8e8edfe14b67.pdf?index=trueIn PDF document text
    • http://bubotelerokuz.rf.gd/populao_angolana.pdfIn PDF document text
    • http://ninanupazazudad.rf.gd/encounter_shankar_movie_in_3gp.pdfIn PDF document text
    • http://pabovabavuwemet.rf.gd/ccna_200_125_book.pdfIn PDF document text
    • https://02796127-04ec-4c85-b270-c6f7310ebb18.filesusr.com/ugd/ce0e6d_c353dab2d49b4f77b96d372f899e3cbc.pdf?index=trueIn PDF document text
    • http://xofiketur.rf.gd/mewifezulanuzolodidulonep.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_off0000d97d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD97D 5300 bytes
SHA-256: d9e7444292f729ebb471bd1b31cd6abfc9ef2be8a78321c543f59a07eed15e08
font_01_sfnt_off0000eb8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB8C 11540 bytes
SHA-256: d52af722a7ba806bf5c022aaa0d03e25842255d052e7fb20df1e0a9ac51357ac

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