Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc96930c758c811d…

MALICIOUS

PDF

68.8 KB Created: 2021-09-30 10:48:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: ce6c23018227baa05afc40c6ed2662e7 SHA-1: f7235044276f2a7cef644c01bd6a209aeb6cb375 SHA-256: cc96930c758c811d9da96aea0d4ae77f30d99d6625eb66e92174b0571ebec1d0
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document exhibits characteristics of a phishing lure, specifically a callback scam. It contains embedded JavaScript and presents itself as an image-only document designed to trick users into clicking on an action trigger. The presence of numerous external URIs and the ML classifier's high confidence score further support its malicious nature. The document's intent is to deceive the user into initiating a phone call, likely for financial fraud or to gain sensitive information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 2 text block(s), carries a click-outward action, and is only 68 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://newdesert.pl/userfiles/file/71532364691.pdf In PDF document text
    • https://mimpi1pusat.com/contents/files/fowexidaxiti.pdfIn PDF document text
    • https://karlschool.org/uploads/files/202109091252547005.pdfIn PDF document text
    • http://zzweien.com/d/files/9145812609.pdfIn PDF document text
    • http://www.waetsukai.jp/system/ckfinder/userfiles/files/93702487192.pdfIn PDF document text
    • http://border-collie.ru/sites/default/files/file/rowugoxadasobedud.pdfIn PDF document text
    • http://sosnovgeo.ru/userfiles/file/58078210121.pdfIn PDF document text
    • https://hotelharmika.com/assets/userfiles/files/3992007331.pdfIn PDF document text
    • http://redigonda.it/userfiles/files/giwipuwowajoneruzovexu.pdfIn PDF document text
    • http://storemisr.com/uploads/files/96412920021.pdfIn PDF document text
    • https://premium-house.uz/images/file/pobaxad.pdfIn PDF document text
    • http://neoneophytou.com/ckfinder/userfiles/files/fokatejelokemofitomukaruv.pdfIn PDF document text
    • http://goodtraefarm.com/ckupload/files/28515830461.pdfIn PDF document text
    • http://konditsionery-zheleznodorozhnyi.ru/upload_picture/file/33841174983.pdfIn PDF document text
    • https://uaqbakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141dc767725c---vumekegusejituvif.pdfIn PDF document text
    • http://inter-travel.hu/_user/file/52560525346.pdfIn PDF document text
    • http://dorisemitchell.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/12794044889.pdfIn PDF document text
    • http://balade-pierry.fr/userfiles/file/wirokalej.pdfIn PDF document text
    • https://uslugiinzynierskie.com/eurostyl/photos/file/gebebivazulidewediti.pdfIn PDF document text
    • http://vwtint.com/userData/board/file/59628571678.pdfIn PDF document text
    • https://thokhoavietnam.com/upload/files/28005191588.pdfIn PDF document text
    • https://slavica.ru/wp-content/plugins/super-forms/uploads/php/files/2dfdd08cd4f071e92ad02bd661fbdb78/51958213282.pdfIn PDF document text
    • http://soloparamideco.com/js/new/fckeditor/userfiles/file/xelupasegisijagamoduveme.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=vidmate+4.4109+app+downloadPDF link annotation
    • 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_off0000b00d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB00D 10824 bytes
SHA-256: 2dad1168f30c7c20e9f43ffee2f469d0507f8beb89e9bc44fe611eb853be8902
font_01_sfnt_off0000c917.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC917 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e129.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE129 14484 bytes
SHA-256: b307ad32dcc25fac4ffbd4ff725fe65624f02adb492e6db59c6f2a56ca420647

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