Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5faa57ed165d13d…

MALICIOUS

PDF

84.5 KB Created: 2021-09-10 05:53:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: c2f9312d1dcbc94b7f12dd283a29d4ac SHA-1: ebb7a0a7041a76d72a8adb417d052f800442f41e SHA-256: d5faa57ed165d13d519ae1e81d3f14a8f1bc5ebe8637d70297ec07fe27131a7a
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

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 and contains embedded JavaScript. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://pixomot.ru/uplcv?utm_term=lucky+patcher+jurassic+world+the+game+2020 PDF link annotation
    • https://xaydungdonggia.com/app/webroot/files/images/pages/files/92256878630.pdfIn PDF document text
    • http://machinesupplier.cn/data/product/file/202198_134642_294.pdfIn PDF document text
    • http://dietmoiquangle.com/webroot/img/files/41761670556.pdfIn PDF document text
    • https://osikovo.eu/webroot/img/content/files/47469293825.pdfIn PDF document text
    • http://share-world.tw/userfiles/file/76896842102.pdfIn PDF document text
    • https://kohphanganhotelandtour.com/userfiles/file/dotiwurapenek.pdfIn PDF document text
    • https://axlthailand.com/imagexx/files/vewaroxofiwusiwifevisa.pdfIn PDF document text
    • http://twinmd.ru/userfiles/file/27613065128.pdfIn PDF document text
    • http://chronocertif.com/userfiles/file/fimox.pdfIn PDF document text
    • http://indagosrl.it/userfiles/files/rifaw.pdfIn PDF document text
    • http://pnmanagementsolutions.in/uploads/bofelolomuwusifusoso.pdfIn PDF document text
    • https://quanghuydulich.vn/img_duhoc/files/gugezomix.pdfIn PDF document text
    • http://hichipper.com/hichipper/uploadfile/file/2021090201484273499.pdfIn PDF document text
    • http://hoangminhceramics.com/app/webroot/uploads/files/miwubuvewe.pdfIn PDF document text
    • https://gagiongvitgiong.com/ckfinder/userfiles/files/pogajifodakanefega.pdfIn PDF document text
    • http://chinatriage.com/ckfinder/userfiles/files/kusok.pdfIn PDF document text
    • http://kepco-group.com/uploaded_files/userfiles/files/95538065355.pdfIn PDF document text
    • https://nstoplana.rs/ckfinder/userfiles/files/jodamevozavuzatu.pdfIn PDF document text
    • http://opusincertum.it/userfiles/files/97974457167.pdfIn PDF document text
    • https://luxesystem.site/js/ckfinder/userfiles/files/44643864004.pdfIn PDF document text
    • http://dokturmice.com/ckfinder/userfiles/files/86920636923.pdfIn PDF document text
    • https://irish-setter-zucht.info/ckfinder/userfiles/files/kobodiga.pdfIn PDF document text
    • http://newtrichur.com/userfiles/file/xozuwifadogaxo.pdfIn PDF document text
    • https://damiel.eu/userfiles/file/tudovebukakavadufilum.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136f0da40f7f---24527199724.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e293.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE293 11580 bytes
SHA-256: 1378e7541e14913f1bdc1e374a0a8ff7560427f2d7f005b65c5611b9f67b8e0c
font_01_sfnt_off0000fe06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE06 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011618.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11618 17592 bytes
SHA-256: c4859d48b662bdb0c9b4354a0c1aa018a3993edd9f53da358ca888299eda0bcb

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