Malicious PDF — malware analysis report

Static analysis result for SHA-256 eadecb113dcdead4…

MALICIOUS

PDF

80.2 KB Created: 2021-09-15 19:04:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: b72a9d4d6765ec909dd185f476990c65 SHA-1: 776336e22081d10684b0467a117e115bb01964b1 SHA-256: eadecb113dcdead4ed0436b965061350710e03b6d799074477b127c41f9a2e14
154 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript and multiple external URIs, indicating an attempt to redirect the user to malicious websites. The presence of a "callback phishing phone lure" heuristic further suggests a phishing or scamming intent. ClamAV detection and ML classification confirm the malicious nature of the file, likely serving as a downloader or redirector for further stages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

Heuristics 7

  • 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.
  • 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://laborke.ru/uplcv?utm_term=new+update+for+redmi+note+9+pro PDF link annotation
    • http://picart-personal.pl/fckupload/upload/file/vodibolimo.pdfIn PDF document text
    • http://espokebar.com/uploads/files/52259032600.pdfIn PDF document text
    • http://kronospan-mofa-hungary.hu/editor_up/bidase.pdfIn PDF document text
    • http://ksiclubcom.ksiclub.org/svnprojects/DHD/Source/images/files/pobapen.pdfIn PDF document text
    • https://pro-biomed.com/admin/userfiles/file/6097243684.pdfIn PDF document text
    • http://www.dr.schure.net/ckfinder/userfiles/files/2909563140.pdfIn PDF document text
    • https://satnamunicipalcorporation.com/admin/ckfinder/userfiles/files/44441170370.pdfIn PDF document text
    • https://protraderin.com/userfiles/file/22706441262.pdfIn PDF document text
    • http://packamate.com/userfiles/sonikumofumef.pdfIn PDF document text
    • https://agri-mal.pl/userfiles/file/63962858311.pdfIn PDF document text
    • https://projetounificado.com/uploads/files/novazonufowusozitabado.pdfIn PDF document text
    • http://philipp-haberland.de/images/upload/file/5508768739.pdfIn PDF document text
    • http://xn--hh0b97d8is16e.com/userData/board/file/zaxaga.pdfIn PDF document text
    • http://amandatour.ru/js/ckfinder/userfiles/files/ratazudupufenafiz.pdfIn PDF document text
    • https://cafeau1ait.xyz/js/ckfinder/userfiles/files/21437797186.pdfIn PDF document text
    • http://kulturazebrak.cz/userfiles/foxujeva.pdfIn PDF document text
    • http://fruitsad.pl/images/file/kufubine.pdfIn PDF document text
    • https://gamepinleri.com/calisma2/files/uploads/77208006338.pdfIn PDF document text
    • http://studiopignotti.it/userfiles/files/74834201541.pdfIn PDF document text
    • http://www.xpresswedding.com/wp-content/plugins/formcraft/file-upload/server/content/files/161413d2f531b2---pujaki.pdfIn PDF document text
    • https://parc-hotel.info/file/2672832235.pdfIn PDF document text
    • https://tranhtreo.com/images/ckeditor/files/jumelisevabex.pdfIn PDF document text
    • https://pleasanton.com/wysiwygfiles/file/73011732458.pdfIn PDF document text
    • https://jdbailbonds.com/wp-content/plugins/super-forms/uploads/php/files/8a8c259ed4f958a37e538226b278aa8d/82458256010.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_off0000d45c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD45C 17660 bytes
SHA-256: 6041b83a47845da5bcf65a254f2825c950a07497d09261d6b82da54607b4d0e2
font_01_sfnt_off00010286.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10286 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011a9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A9D 10776 bytes
SHA-256: c9989da3f857e9839baf98cd7d3f7be8411b18601c584844eecea7a2fb217af2