Malicious PDF — malware analysis report

Static analysis result for SHA-256 286457af16a9c38f…

MALICIOUS

PDF

70.8 KB Created: 2021-09-20 21:32:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 54077d6015719e5a78ffb7bb9360a434 SHA-1: d137c0edc0b0459b88f37656659108b3e78b8812 SHA-256: 286457af16a9c38f9668087f74221352eadce1aade3998202ade8e2f779a6036
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, a common technique for executing malicious code within documents. The presence of numerous external URLs, including one pointing to 'pixomot.ru', suggests a phishing or malware distribution scheme. ClamAV and ML classifiers also flagged this file as malicious, indicating a high likelihood of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

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://pixomot.ru/uplcv?utm_term=wow+bfa+follower+equipment PDF link annotation
    • http://www.uc-kushiro.net/images/library/File/guvalamuxevavipenabo.pdfIn PDF document text
    • http://wtmongolia.com/materials/file/53871536392.pdfIn PDF document text
    • https://shining4u.com/wp-content/plugins/super-forms/uploads/php/files/cf0aa7e7d19c6197d0d5ba8df3538747/pexelanina.pdfIn PDF document text
    • http://elhammagazine.com/ckfinder/userfiles/files/zorogawebisojadexagelek.pdfIn PDF document text
    • https://brothers-music.com/ckfinder/userfiles/files/divubakupidi.pdfIn PDF document text
    • http://gojjang.com/uploads/files/41429812094.pdfIn PDF document text
    • https://koltoztetes-szallitas-lomtalanitas.com/ckfinder/userfiles/files/54726426423.pdfIn PDF document text
    • https://pet-fashion.ro/mm/file/45639901032.pdfIn PDF document text
    • http://ipsaix.com/ckeditor/ckfinder/userfiles/files/94479551962.pdfIn PDF document text
    • http://ks4073.com/file_media/file_image/file/59324780324.pdfIn PDF document text
    • https://agermag.ro/mm/file/simomudopupuvozenosuzirul.pdfIn PDF document text
    • http://elturo.ru/img/upload/files/wobozobiwosexu.pdfIn PDF document text
    • https://indolabtek.com/Uploads/userfiles/files/99493172961.pdfIn PDF document text
    • http://ulrike-mayer.de/userfiles/files/vesujiwotegixopanaxol.pdfIn PDF document text
    • http://www.celso.org/download/1949524237.pdfIn PDF document text
    • https://luatkhangthai.vn/upload/fck/file/xatunepukifujuwifenajudo.pdfIn PDF document text
    • http://flirdining.com/uploads/files/45689795380.pdfIn PDF document text
    • https://www.audifonosdoshoydos.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141fef877aee---69466184160.pdfIn PDF document text
    • http://yongchengtech.com/uploads/files/202109091411443972.pdfIn PDF document text
    • http://nanchang.chinatupai.com/web/js/ckfinder/userfiles/files/73227851515.pdfIn PDF document text
    • http://booklandbooks.com/userfiles/file/tusazipixopusuxe.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_off0000b36a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB36A 10816 bytes
SHA-256: 518795b2b9322a9afff2d13c0621056fd5c7617d88fc731a2d618b0e023a8dad
font_01_sfnt_off0000cc24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC24 16312 bytes
SHA-256: 96bd5fbdc173b5071730359b4733edfc3e973f0f26add7f55b6ba3fb498f7918
font_02_sfnt_off0000f5a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5A4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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