Malicious PDF — malware analysis report

Static analysis result for SHA-256 5457f5b4acb08cb5…

MALICIOUS

PDF

71.0 KB Created: 2021-09-15 23:16:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 163deec7a66942a4021f79ab935d831c SHA-1: 6076a777f12f3abb6f351463ee9a09a3ba728c87 SHA-256: 5457f5b4acb08cb53ce791a8bc077f6a9ca2232a9abbc0b776ec92baae1f2df8
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains numerous external URIs, many of which are hosted on disposable domains and appear to be part of a link farm. The presence of a 'minecraft download' UTM term suggests a lure to trick users into downloading malicious content. ClamAV and ML classifiers also flagged this PDF as malicious, indicating a high likelihood of it being a phishing or malware distribution document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

Heuristics 5

  • 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.
  • 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://queure.ru/uplcv?utm_term=minecraft+download+free+download+on+android PDF link annotation
    • https://slotpt2.com/contents/files/wowudowowevewi.pdfIn PDF document text
    • http://ksklinika.ru/ckfinder/userfiles/files/64859545222.pdfIn PDF document text
    • https://immsac.pe/sgi_userfiles/userfiles/files/mixanujululunoteka.pdfIn PDF document text
    • http://amsuatrust.org/survey/userfiles/files/71899027381.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/3c0abf2e743cae1d318542c8f2e59281/43858035384.pdfIn PDF document text
    • http://4reality.cz/userfiles/files/95681818029.pdfIn PDF document text
    • http://badaranquehablar.com/userfiles/files/zazibelowojegufozuzate.pdfIn PDF document text
    • http://mothertheresapublicschool.com/userfiles/file/5709248987.pdfIn PDF document text
    • http://allineers.morefriendship.com/upload/files/74392661322.pdfIn PDF document text
    • http://lapawan15.com/shop/fck_file/file/92639368591.pdfIn PDF document text
    • http://yidaig.com/uploadfile/file/20210905173255.pdfIn PDF document text
    • http://salukool.ee/upload/userfiles/file/18557448364.pdfIn PDF document text
    • http://xn--j1aai7d.xn--p1ai/userfiles/file/71018181994.pdfIn PDF document text
    • https://tonere.shop/app/webroot/files/userfiles/files/segegupajobupeb.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130903b72464---95859090603.pdfIn PDF document text
    • http://kanoonkaraj.ir/dbmanager/filebank/htmlgallery/file///96513759532.pdfIn PDF document text
    • http://www.asiacoservice.com/file/files/77339261406.pdfIn PDF document text
    • http://esllearningbydesign.com/app/webroot/files/file/66363247477.pdfIn PDF document text
    • http://akinmedikal.com/uploads/file/gobubekezeti.pdfIn PDF document text
    • http://csc0512.com/userfiles/file/20210908174424_jggysi.pdfIn PDF document text
    • http://baobianhkhang.com/upload/files/wiraruvikawosorerupobula.pdfIn PDF document text
    • https://carparts-fixture.com/file/file/vuvixojinunuvuv.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_off0000b63d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB63D 15920 bytes
SHA-256: 931e5f33d9f11c02e8c809113a581305db1bdf82ab20d851dee2b5dafe16feb1
font_01_sfnt_off0000def7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEF7 10380 bytes
SHA-256: 0a34e72afd48535dae6081431935dc5363a83bbd7a33300c73a5d04eb93a2a06
font_02_sfnt_off0000f6a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6A1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.