Malicious PDF — malware analysis report

Static analysis result for SHA-256 d12713e9e5a5ecf8…

MALICIOUS

PDF

69.2 KB Created: 2021-10-02 22:53:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 38736d37b59fef26f2e5b56c340a3395 SHA-1: 166b219ca2a655deb670aec68a98dc70195ffbdb SHA-256: d12713e9e5a5ecf84de33c7d2f6185d4f452553af960a35fbe7651b73f62b9a8
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains embedded JavaScript, which is a common technique for exploiting vulnerabilities or redirecting users to malicious sites. The numerous external URIs, many hosted on disposable domains, strongly suggest a phishing or malware distribution campaign. The ML classifier and ClamAV detection further confirm the malicious nature of this PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://laborke.ru/uplcv?utm_term=lyubomirsky+the+how+of+happiness+pdf PDF link annotation
    • http://gtlmarinefuel.com/userfiles/file/88410732444.pdfIn PDF document text
    • http://heathrowairporttaxi.website/userfiles/file/dokesubad.pdfIn PDF document text
    • http://cancunday.com/travela/img/files/64750425804.pdfIn PDF document text
    • http://www.phsdcenter.com/temp/js/ckfinder/userfiles/files/zubisu.pdfIn PDF document text
    • http://wwm-quanta.com/upload/files/sekexejifozeneligulig.pdfIn PDF document text
    • http://www.corazondelsol.es/ckfinder/userfiles/files/woboxuxukepivibumalajeda.pdfIn PDF document text
    • https://residenciasanamaro.es/userfiles/files/78391174949.pdfIn PDF document text
    • https://artofsurfing.com/preview/ckfinder/userfiles/files/77609902555.pdfIn PDF document text
    • http://dailyxedayhang.com/userfiles/files/57182908924.pdfIn PDF document text
    • https://www.budgetskemaet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1613c7819992bc---batetim.pdfIn PDF document text
    • http://tribo.kz/userfiles/File/68725644865.pdfIn PDF document text
    • http://leylasuren.com/images/userfiles/imagefile/fakanivulipolifenuwakub.pdfIn PDF document text
    • https://idroilektriki.gr/files/file/93335058266.pdfIn PDF document text
    • http://twinmd.ru/userfiles/file/laniwetotoxanukalifafonu.pdfIn PDF document text
    • https://michelbarbot.com/upload/files/32171784313.pdfIn PDF document text
    • http://goang-hann.com/uploads/files/202110021914121895.pdfIn PDF document text
    • http://mh-gartengestaltung.de/userfiles/file/81061031914.pdfIn PDF document text
    • http://tsrmmessina.it/userfiles/files/59832131683.pdfIn PDF document text
    • https://sailstudy.in/ckfinder/userfiles/files/lanobuf.pdfIn PDF document text
    • http://brandnewgoods.net/userfiles/file/mikexodolake.pdfIn PDF document text
    • http://inewbus.com/wp-content/plugins/super-forms/uploads/php/files/nbkjft1mlcd744ag2d4talgdp6/13360524564.pdfIn PDF document text
    • http://the100voicesofgospel.de/fichiers/newsletter/file/vowebe.pdfIn PDF document text
    • http://maremio.ru/admin/ckfinder/userfiles/files/15544937288.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_off0000ae5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAE5B 11204 bytes
SHA-256: 22ae7aa950b2b1d98659f052d6032573031866b9bd6751cba1c747938065f73a
font_01_sfnt_off0000c84c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC84C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e05e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE05E 15340 bytes
SHA-256: 82e3261c5e7cede89438c5d10d29debc222c8f91a4292d921184641e146254eb

Open this report in the interactive analyzer, or submit your own file for analysis.