Malicious PDF — malware analysis report

Static analysis result for SHA-256 95ac8c6e967bf56b…

MALICIOUS

PDF

100.3 KB Created: 2021-09-17 21:36:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: bede2759ab2f4190fbafbb73aba62097 SHA-1: c6af7b2f30a90ef72d1ec0e1367d5b50700ad2b6 SHA-256: 95ac8c6e967bf56b25fd22692efe2c2d75934663e76d5de4e0bc48d740d1098e
154 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript and a large number of external URIs, many of which are hosted on disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The presence of embedded JavaScript suggests it may be used to further obfuscate the malicious links or initiate a download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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
  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://pistant.ru/uplcv?utm_term=carrom+clash+dot+apk PDF link annotation
    • http://chpcentre.com/files/file/9226336158.pdfIn PDF document text
    • https://tideandtigers.com/ckfinder/userfiles/files/padujurutebaniderelama.pdfIn PDF document text
    • http://tuvanthanhlapcongty.biz/upload/ck/files/nifot.pdfIn PDF document text
    • http://mrrb.nexgendevgroup.com/files/18173351040.pdfIn PDF document text
    • http://igs.compcierge-asia.com/ckfinder/userfiles/files/89922239355.pdfIn PDF document text
    • https://sinarlangit1.com/contents/files/zusufarafusow.pdfIn PDF document text
    • https://kokomanis.com/contents/files/52508444206.pdfIn PDF document text
    • https://www.sensormaticltd.com/app/templates/js/ckfinder/userfiles/files/revojuriwex.pdfIn PDF document text
    • http://bernardthevenet.fr/ckfinder/userfiles/files/tixagavotulawilagusodu.pdfIn PDF document text
    • http://twilaw.com/files/files/vajimefu.pdfIn PDF document text
    • http://rund.cz/UserFiles/File/gakisupozo.pdfIn PDF document text
    • https://pepsima.biz/files/file/vimubijewafijemekaw.pdfIn PDF document text
    • http://protok.pro/upload/files/11112194218.pdfIn PDF document text
    • http://www.anclupnapoli.it/userfiles/file/menadumekosojapamizeze.pdfIn PDF document text
    • http://zapatosperezcabrera.com/ckfinder/userfiles/files/mimakerodapijal.pdfIn PDF document text
    • http://leebyunghun.kr/new/upload/board/files/jarinoxujow.pdfIn PDF document text
    • http://zhongguohuachun.com/d/files/defirotusotu.pdfIn PDF document text
    • http://dunakeszi.varosom.hu/userfiles/files/28675852374.pdfIn PDF document text
    • https://autotoner123.com/home/autotone/public_html/ckeditortest_WORKING/ckfinder/userfiles/files/57964843871.pdfIn PDF document text
    • http://hb-hospital.com/file_upload/fck_upfile/file/69281650827.pdfIn PDF document text
    • http://gsmontaggi.it/userfiles/files/finoluxelaguribatukuzov.pdfIn PDF document text
    • http://jujucuisine.com/userfiles/file/90523144576.pdfIn PDF document text
    • http://z500.si/files/49578631495.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_off00011997.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11997 10572 bytes
SHA-256: 54e67fea35c5c7ff2288d330a30df5bb9ded8f50a4bf7da16d4e82c675dc9294
font_01_sfnt_off000131c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131C7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000149d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x149D9 21944 bytes
SHA-256: d46fcc9001b86990a85aa97e4c73fb3cf0e27575ce4b591ca818aef7c81bbd27

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