Malicious PDF — malware analysis report

Static analysis result for SHA-256 e557b46004ed2582…

MALICIOUS

PDF

69.2 KB Created: 2021-09-29 10:53:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: e3c4be954202a9538235f7264929c734 SHA-1: 3653fb2e645916955f3c73e0eb0430ecd90e9b25 SHA-256: e557b46004ed258222ec9a511ac56adec126017198919e7c4d6760b9e008f070
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file is identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing lure. It contains an image-based screenshot designed to trick users into clicking a link, which redirects to a URL on potentially disposable hosting. This pattern suggests an attempt to deliver a secondary payload or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9849

Heuristics 6

  • 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 0 text block(s), carries a click-outward action, and is only 69 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.
  • 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=doraemon+gta+san+andreas+game+download+apk PDF link annotation
    • http://rosabaum.de/web/editor/files/vijamim.pdfIn PDF document text
    • http://planet-for-events.de/userfiles/file/52881549181.pdfIn PDF document text
    • http://buffagiuseppeinfissi.com/userfiles/files/defegepafugemivole.pdfIn PDF document text
    • http://yujinpharma.com/upload/files/nawokukebone.pdfIn PDF document text
    • http://www.anapharmata.hu/ckfinder/core/connector/php/files/pesuwugogifavozif.pdfIn PDF document text
    • http://www.eflox.net/wp-content/plugins/formcraft/file-upload/server/content/files/1613ebe9d5c0a2---40892731937.pdfIn PDF document text
    • http://wangguanhardware.com/userfiles/file/15965917186.pdfIn PDF document text
    • http://kunjipsc.com/uploads/files/32241879140.pdfIn PDF document text
    • http://519pf.com/userfiles/files/89611570510.pdfIn PDF document text
    • http://korea-labels.com/ckfinder/userfiles/files/lasedejigudud.pdfIn PDF document text
    • http://senseoftourism.dk/userfiles/file/26277850462.pdfIn PDF document text
    • http://oshcongregation.com/userfiles/file/95452755234.pdfIn PDF document text
    • https://alubiasdetolosa.com/files/galeria/files/26468323745.pdfIn PDF document text
    • http://edu-family72.ru/content/images/uploads/file/7106289189.pdfIn PDF document text
    • http://buzmakov-ua.ru/admin/ckfinder/userfiles/files/6182437777.pdfIn PDF document text
    • http://mengnuanua.com/app/webroot/files/files/81331120413.pdfIn PDF document text
    • http://mail-business.ru/uploads/file/10542772917.pdfIn PDF document text
    • https://www.goldenplanet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1613b4308e44f7---xizuz.pdfIn PDF document text
    • http://ksiclubcom.ksiclub.org/svnprojects/DHD/Source/images/files/memono.pdfIn PDF document text
    • http://kool-house.com/upload/editor/file/61223811482.pdfIn PDF document text
    • https://tecnibat.net/uploads/archivos/93264507493.pdfIn PDF document text
    • http://tatvideo.ru/ckfinder/userfiles/files/82831635384.pdfIn PDF document text
    • https://cleanenergy.mn/uploads/files/wefenevijusaribebowule.pdfIn PDF document text
    • https://atarentacarburdur.com/userfiles/file/zofavutasilanisemeredob.pdfIn PDF document text
    • http://khacvietlaser.vn/public/images_news/files/kiwivadalilugeletamal.pdfIn PDF document text
    • https://whatshoulditcostme.com/userfiles/file/12605418341.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_off0000b0c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB0C0 10820 bytes
SHA-256: 5bfdb59bf8797bec9b0031c0a7c0788c08997bfcc743f5bbd20e75f4f73a7140
font_01_sfnt_off0000c997.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC997 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e1a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1A9 14260 bytes
SHA-256: 5df319b095d03701b793618f686641100b17a97bcf0cc8c0436b0cf86c910e34