Malicious PDF — malware analysis report

Static analysis result for SHA-256 49525556fae4212e…

MALICIOUS

PDF

80.8 KB Created: 2021-09-15 18:36:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 134e05960eafcdc231e50d05beab7cc9 SHA-1: 13c2e19646e5ad81c94e09e5496f51245fdc7854 SHA-256: 49525556fae4212edabf60fefca927d3ecc7f57062a4864339a491fc2142e81d
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is a common technique for executing malicious code within documents. The presence of numerous external URLs, many with 'utm_term' parameters suggesting tracking or redirection, indicates an attempt to lead the user to external resources. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://huntic.ru/uplcv?utm_term=narcos+watch+online+free PDF link annotation
    • http://kaus21.com/userData/board/file/82046431708.pdfIn PDF document text
    • http://sangsangins.com/upload/upload/file/digukodetikimebob.pdfIn PDF document text
    • http://sweet-sugar.de/images/uploadedimages/file/reneledusuzixovozajobobot.pdfIn PDF document text
    • http://aviapartner.biz/js/ckfinder/userfiles/files/vulamotikoxukoworoke.pdfIn PDF document text
    • https://partnermind.cz/images/files/15624340797.pdfIn PDF document text
    • http://hosungtour.com/FileData/ckfinder/files/20210905_FED2D27166323ED3.pdfIn PDF document text
    • http://flooroverstock.com/admin/userfiles/file/mufuzuponozetel.pdfIn PDF document text
    • https://bu8m3tas68s-b1.com/contents/files/93264215649.pdfIn PDF document text
    • http://officeharbor.com/pdtInfo/18877264705.pdfIn PDF document text
    • http://location-appartement-venise.com/italie_documents/files/ronejosir.pdfIn PDF document text
    • http://car-zone.sk/data/data/file/naxuzazotakinamuxasete.pdfIn PDF document text
    • http://ros.by/ckfinder/userfiles/files/39285317511.pdfIn PDF document text
    • https://raljob.com/userfiles/file/tujogezikekagu.pdfIn PDF document text
    • http://dekogard.net/deko/veri/_files/37925537521.pdfIn PDF document text
    • http://daltan.hu/userfiles/file/ravugupoginojo.pdfIn PDF document text
    • http://svarovani-tig.cz/userfiles/file/nawojifigemafedawubu.pdfIn PDF document text
    • http://jjkxmy.com/upload/files/202109062154019766.pdfIn PDF document text
    • https://zenithoverseas.com/assets/userfiles/files/54866104552.pdfIn PDF document text
    • https://ideylia.fr/uploads/file/21047508094.pdfIn PDF document text
    • https://dangeloremodeling.com/nbloom/fckuploads/file/pewuvipugokote.pdfIn PDF document text
    • http://honyi.tw/ckfinder/userfiles/file/worawumurawezijifelo.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_off0000d722.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD722 18068 bytes
SHA-256: 65f175b75e22587e2e0f06b78ae14740cd6d5c419d2871be38823747bb4c0aff
font_01_sfnt_off000105bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105BF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011dd6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DD6 10496 bytes
SHA-256: d079e37d6326c4937aaf0dc19b7be43608caca5d5d60eba550153e36757e060e

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