Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f0516850640aa17…

MALICIOUS

PDF

69.5 KB Created: 2021-10-01 02:22:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 6b0d7f63a359b6c9dac5234672a98a9e SHA-1: d7c9904b7b3572d235cf7e3e435da18dbb337569 SHA-256: 0f0516850640aa17da9fbe4cdfe3a6eec9879aad3c306ecf12ade545d1971ba5
154 Risk Score

Malware Insights

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

This PDF document is identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing lure. It contains embedded JavaScript and numerous external URIs, suggesting an attempt to redirect users to malicious sites. The heuristic 'PDF_IMAGE_LURE' indicates the document is designed to trick users into clicking a hidden element, likely leading to the execution of the embedded JavaScript or navigation to one of the listed URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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 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.
  • 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 http://ngor2-3.com/file_media/file_image/file/81670760645.pdf In PDF document text
    • http://intelekt.biz/uploads/pages/files/99296011474.pdfIn PDF document text
    • https://kubermatkaplay.com/ckfinder/userfiles/files/pinatujanetugozokadire.pdfIn PDF document text
    • http://inistor.com/ufiles/files/vedobupezato.pdfIn PDF document text
    • https://copperscraphandlers.com/ckfinder/userfiles/files/dozipenamofugavudawef.pdfIn PDF document text
    • http://dungcumaymoc.com/Images_upload/files/zidopizax.pdfIn PDF document text
    • https://matfplayer.com/calisma2/files/uploads/99691621152.pdfIn PDF document text
    • http://thebodyclubonline.com/userfiles/file/vasobawujex.pdfIn PDF document text
    • http://mptech.vn/ckfinder/userfiles/files/xofumefuxovefasumajitaxoz.pdfIn PDF document text
    • http://ping-property.com/user_img/files/siloxavutaforadap.pdfIn PDF document text
    • http://danceaction.be/userfiles/file/jidomefovewoxemete.pdfIn PDF document text
    • https://pracowniatechart.pl/fckpliki/file/riror.pdfIn PDF document text
    • https://rainbowfurnitures.com/files/files/bafedunenapetovevifovun.pdfIn PDF document text
    • http://zrdb-drogbud.pl/Upload/file/famifa.pdfIn PDF document text
    • http://algarestofos.pnh.pt/js/ckfinder/userfiles/files/sijixiwetanotebonizumid.pdfIn PDF document text
    • https://psiakocky-potisk.cz/webpagebuilder/ckfinder/userfiles/files/jerepibuxumakubizes.pdfIn PDF document text
    • http://feriaalainversa.com/uploaded/files/kavuraxitirazuzeruk.pdfIn PDF document text
    • http://laihoawedding.com/app/webroot/upload/files/1813570021.pdfIn PDF document text
    • http://puisan.ru/uploads/file/89437007975.pdfIn PDF document text
    • https://gdaniec.com/upload/files/bedutikenejegavuxok.pdfIn PDF document text
    • http://montex.pro/uploads/userfiles/file/donizusedajenapifuze.pdfIn PDF document text
    • http://attep.com/home/sandbox/domains/heekee.com.hk/public_html/ckfinder/userfiles/files/5982716369.pdfIn PDF document text
    • https://aldaserwis.pl/ckfinder/userfiles/files/niwukeregowenezobax.pdfIn PDF document text
    • http://furkansigorta.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1614099706a4ea---gerixuzemupejugosu.pdfIn PDF document text
    • http://susasoft.com/upload/userfiles/files/83959416814.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=tamilgun+hd+movies+2020PDF link annotation
    • 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_off0000b308.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB308 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cb1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB1A 14156 bytes
SHA-256: 5ce8788e7cb526cfe97f341fcf45292d834659cfed22d9650f3e4c5e14b1070a
font_02_sfnt_off0000ee11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE11 10868 bytes
SHA-256: a97a7e8070c56da4ef6f00043afbe9532540f95c720d16ce0c51d791bb2e7860

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