Malicious PDF — malware analysis report

Static analysis result for SHA-256 34283be3392c8ee8…

MALICIOUS

PDF

117.6 KB Created: 2021-03-20 11:23:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 5de056a6956ff226eb3122450ce27ece SHA-1: 1649935ba9e39c73f9abbc51029369777d641073 SHA-256: 34283be3392c8ee8fc6a4b0c086ef83a8eda3b1199557bf63d22439ae8639a0a
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9997

Heuristics 5

  • 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 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://fokemale.ru/strik?utm_term=agatha+christie+books+for+sale+uk PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4452374/normal_60248ea37c948.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449004/normal_602b832e0f182.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450160/normal_5feefa7a7e8ee.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383806/normal_5ffcfe1f11e5c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449779/normal_600a4c5d32818.pdfIn PDF document text
    • http://jivavesomuviz.getenjoyment.net/que_es_el_analisis_del_discurso_luis_cortes_rodriguez.pdfIn PDF document text
    • http://digovin.getenjoyment.net/unearthed_arcana_d_d_5e.pdfIn PDF document text
    • https://cdn.sqhk.co/kujotukil/Ohe6Ohg/resexatamopifozojosasub.pdfIn PDF document text
    • http://tebogekememesij.mygamesonline.org/collapse_of_the_republic_fantasy_flight.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501383/normal_5ffbad3c09d53.pdfIn PDF document text
    • https://cdn.sqhk.co/xefijumu/fmWAgfV/r-_type_dimensions_ps3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425483/normal_602ac482e5764.pdfIn PDF document text
    • http://jukojadijomefar.medianewsonline.com/69856997993.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/megodipewukitoj/87220847764.pdfIn PDF document text
    • https://d89d6b52-6e76-4e18-bccb-bd7428cfddad.filesusr.com/ugd/02beb7_c989e0d75c2443c284e575193ee84414.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jamuluvuvava/cosmetics_brochure_design_free.pdfIn PDF document text
    • https://s3.amazonaws.com/kujesulad/kofajewazi.pdfIn PDF document text
    • http://puribisipup.atwebpages.com/jelitizapowapavagedus.pdfIn PDF document text
    • https://s3.amazonaws.com/feliso/tuxofebewikere.pdfIn PDF document text
    • https://7e079b21-6cfc-4bbc-a8af-001f4930a7f2.filesusr.com/ugd/f66805_c2d4d3adb72242758f77d13efa238ac0.pdf?index=trueIn 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_off00018d6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18D6D 5336 bytes
SHA-256: 05921592ac00e6142ef09a1e64b1f488c9bcd4c0098b0527f6a99ffda8b34081
font_01_sfnt_off00019f97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19F97 11524 bytes
SHA-256: e1110d38cdfafd83532f16c90939d8b45a2e4edb8df587cb74cc26d7d7c9d309

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