Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5979bedae143e58…

MALICIOUS

PDF

67.1 KB Created: 2021-09-17 15:43:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: be9e614ee8880fed8463eca7c4763652 SHA-1: cfb1f49c588f1656d8e101d5e060ac5f40f446a2 SHA-256: e5979bedae143e5826e8cb21b1e611b591fb488cf651b3107e3d7d76968fa018
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and is identified as a phishing lure, typical of malware distribution. The document leverages a link farm hosted on multiple disposable domains, suggesting an attempt to obscure the ultimate destination of malicious payloads. The presence of embedded JavaScript indicates potential for further malicious actions, such as downloading and executing additional malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

Heuristics 7

  • 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 67 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.
  • 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://synerhu.ru/uplcv?utm_term=castlevania+lords+of+shadow+apk PDF link annotation
    • http://imbirimbir.ru/files/karexotadupuzud.pdfIn PDF document text
    • http://jingmingtai.com/filespath/files/20210915171747.pdfIn PDF document text
    • http://uniradioweb.info/userfiles/file/tezupot.pdfIn PDF document text
    • http://antik-cafe-bergen.de/wp-content/plugins/formcraft/file-upload/server/content/files/16140dc9909d74---domakedidamakitediridor.pdfIn PDF document text
    • http://www.majbrno.cz/uploads/files/pixajozomo.pdfIn PDF document text
    • http://nemeckystrakac.sk/editor_uploads/files/kevavopefidikezo.pdfIn PDF document text
    • http://nassagroup.org/app/webroot/js/ckfinder/userfiles/files/tesasuvemerikikomojik.pdfIn PDF document text
    • https://dangeloremodeling.com/nbloom/fckuploads/file/rumijopituwotebasabiwile.pdfIn PDF document text
    • http://milwaukee.center/userfiles/file/74467873980.pdfIn PDF document text
    • http://a-aqua.fr/ressource/site-image/files/97751814366.pdfIn PDF document text
    • https://chambres-hotes-aube-bleue.fr/userfiles/file/girakosinemekolo.pdfIn PDF document text
    • http://lafiestadelmoto.cz/files/file/gisesidadowivoniniwuwowak.pdfIn PDF document text
    • https://ezokniga.com/uploads/file/87935762723.pdfIn PDF document text
    • http://yejiya.com/userfiles/file/9645551193.pdfIn PDF document text
    • http://factory-01.com/js/upload/files/72678901244.pdfIn PDF document text
    • https://inijariku.ugdherbal.com/ckfinder/userfiles/files/72230892033.pdfIn PDF document text
    • https://netiko.ge/img/Data/file/75269510271.pdfIn PDF document text
    • https://camgloberealtor.com/userfiles/file/komivazibaxedi.pdfIn PDF document text
    • http://orderkai.com/uploads/files/24480377483.pdfIn PDF document text
    • http://gu-bo.cn/uploads/files/85325768022.pdfIn PDF document text
    • https://tekartltd.com/upload/files/zutofodubapukumiw.pdfIn PDF document text
    • https://marblo.ph/app/webroot/img/files/vosibatufikeji.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_off0000ac9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAC9A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c4ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4AC 13464 bytes
SHA-256: 48a62cb5287f42f445227a09044cd1a32d60a633586785e82ddee478a6bd025b
font_02_sfnt_off0000e5d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5D9 10868 bytes
SHA-256: c4338202d3c1fb5afbb9fc5ffe12caf601367c645604add549daaeb1f061eb8b