Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e45ff904e7d57d9…

MALICIOUS

PDF

75.5 KB Created: 2021-09-16 19:04:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 8b6d581be8a2dd6b95588f4010c281d9 SHA-1: da324ef8fd4bbea9ee4551dde9be75d4c8732038 SHA-256: 7e45ff904e7d57d92191bcb8099b3d5ee8343fa48d322160af8129f730672412
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs pointing to disposable domains, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The presence of embedded JavaScript suggests it may be used to redirect the user or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://allytemp.ru/uplcv?utm_term=fnf+whitty+mod+mobile+apk PDF link annotation
    • http://alexdisinfestazioni.com/userfiles/files/5198349125.pdfIn PDF document text
    • https://ladachess.ru/userfiles/file/janulixopozasaritigenadu.pdfIn PDF document text
    • https://alzubidi.com/userfiles/files/20861164686.pdfIn PDF document text
    • https://aventura-agence.lu/userfiles/files/bopujusadesasowa.pdfIn PDF document text
    • http://polenes.cl/userfiles/file/tuseluvupivumow.pdfIn PDF document text
    • http://3bbb.fr/ckeditor/upload/files/78641465136.pdfIn PDF document text
    • http://lnianemarzenie.pl/userfiles/file/92463188711.pdfIn PDF document text
    • http://akiyastyle.com/app/webroot/js/ckfinder/userfiles/files/54587615629.pdfIn PDF document text
    • http://ser-buk.com/userfiles/file/25564438576.pdfIn PDF document text
    • http://eastcity.hu/ufiles/file/19302451851.pdfIn PDF document text
    • http://xn--365-pn7mwb654m2qn.com/ckupload/files/pobilaxitenatoxaju.pdfIn PDF document text
    • http://i-daa-wl.de/userfiles/38245877224.pdfIn PDF document text
    • http://tabouligrill.com/ckfinder/userfiles/files/tedisegokipu.pdfIn PDF document text
    • http://x04ydivan.ru/userfiles/file/feloduv.pdfIn PDF document text
    • http://zjleiou.com/images/upload/File/77071599545.pdfIn PDF document text
    • http://www.hausman.eu/images/wyswig_images/file/rolez.pdfIn PDF document text
    • http://fleshlight-tw.com/userfiles/file/sudedaw.pdfIn PDF document text
    • http://crosswaysrecruitment.com/userfiles/file/23202920373.pdfIn PDF document text
    • http://mensagemcrista.com.br/ckfinder/userfiles/files/86343654143.pdfIn PDF document text
    • http://kaizenlife.com/ckfinder/userfiles/files/65377259642.pdfIn PDF document text
    • https://zifu-tech.com/app/webroot/userfiles/files/poxusedipomekoramuli.pdfIn PDF document text
    • http://jodhpurheritagewalk.com/images/file/xobux.pdfIn PDF document text
    • https://djennebeads.com/nbloom/fckuploads/file/5374909013.pdfIn PDF document text
    • https://muzpony.de/obrazki/file/90380147103.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_off0000c249.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC249 17468 bytes
SHA-256: 66ac0f811457b5281d0b8cd8b61eb889546875560f236f7df35c927177bc1e3f
font_01_sfnt_off0000ef38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF38 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001074f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1074F 10904 bytes
SHA-256: a8376c23a830f19ed312ffe33615350a9be58a11594b785fc14b5960eca6134b

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