Malicious PDF — malware analysis report

Static analysis result for SHA-256 e15cf5bfb953fb0a…

MALICIOUS

PDF

78.1 KB Created: 2021-05-20 20:00:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 1fb7986709caca56d8bbcdac14ee00e9 SHA-1: 217c1cde6c9753091aab4aa2d2153a7399f9830c SHA-256: e15cf5bfb953fb0a0afa7b7bf774f8dc5d359712185a1f38980656fb16c1eca4
156 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 0.9996

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 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.
  • 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://mezovuduw.ru/strik?utm_term=an%25C3%25A1lise+sint%25C3%25A1tica+%25C3%25A9+morfol%25C3%25B3gica+exerc%25C3%25ADcios+resolvidos+pdf PDF link annotation
    • https://fofoxugijajeb.weebly.com/uploads/1/3/4/7/134729320/439669.pdfIn PDF document text
    • https://liroxinumapidaz.weebly.com/uploads/1/3/5/3/135348088/4757047.pdfIn PDF document text
    • https://pobanuritixejun.weebly.com/uploads/1/3/4/6/134601578/1b1247b2a919f.pdfIn PDF document text
    • https://tetusujofejami.weebly.com/uploads/1/3/2/6/132695476/gamuweguzazuf.pdfIn PDF document text
    • https://kabaposirivapej.weebly.com/uploads/1/3/2/6/132680813/lobixefik-gafawev-romidapem-winetifij.pdfIn PDF document text
    • https://redawisifakaw.weebly.com/uploads/1/3/4/4/134481039/merusudexo.pdfIn PDF document text
    • https://vipunufevewe.weebly.com/uploads/1/3/0/8/130874016/1749618.pdfIn PDF document text
    • https://sidagavaru.weebly.com/uploads/1/3/2/8/132814791/9111774.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/fazujo/79191637889.pdfIn PDF document text
    • https://s3.amazonaws.com/fatisake/aadat_se_majboor_film_songs.pdfIn PDF document text
    • https://s3.amazonaws.com/voropa/old_benoni_defense_mujannah_formation.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a7c1d407-cf2b-4a56-bfd1-34c940df9a71/76525951901.pdfIn PDF document text
    • https://s3.amazonaws.com/satulibaren/miwazesugijawewebuzirari.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/594e017f-7502-4a50-b259-14cd7a396751/pofepefi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc1c83be-6773-4da7-859d-f576b53179c4/beforipogukal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5acf9c65-27c2-460f-911e-eb5e73b4d062/hamlet_the_movie_mel_gibson.pdfIn PDF document text
    • https://s3.amazonaws.com/navoburarovada/asian_forest_scorpion_information.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/65856d3b-0822-4166-802d-68093c0357bf/mr_coffee_coffee_maker_bvmc-sjx33gt_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/xopugup/81801635725.pdfIn PDF document text
    • https://s3.amazonaws.com/naxozelozude/48093172043.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c85d0d6-32bf-482e-be16-f19373c0e251/6420658074.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/52052250-0104-4112-809c-077fcf53ca8d/19900282428.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_off0000ec3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC3C 6160 bytes
SHA-256: c02b54156896147c80c752258bb6df8cfb1acd355cbc854684a01b35496b122e
font_01_sfnt_off00010008.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10008 13252 bytes
SHA-256: 761bf1c62f8132c6b9626beb6fa28357590e51bf5d5723fd4efb12513641c93c

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