Malicious PDF — malware analysis report

Static analysis result for SHA-256 62dc147563734c1a…

MALICIOUS

PDF

72.4 KB Created: 2021-09-16 14:48:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: 6747ec2c8ec464fb10f75b1d38ec879d SHA-1: cbffe68e195fc4d131b7710724f9dcb3f3f45777 SHA-256: 62dc147563734c1a194091ed1d9863a44b858f8d9204014172c4f794e4b8e548
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is a common technique for exploiting PDF vulnerabilities or redirecting users to malicious sites. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' and the numerous extracted URLs suggest an attempt to distribute phishing content or malware. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 6

  • 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.
  • 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://durimawar.com/contents/files/lividobejik.pdf In PDF document text
    • http://ping-property.com/user_img/files/68785440063.pdfIn PDF document text
    • http://k3projekt.pl/uploads/userfiles/files/3656298732.pdfIn PDF document text
    • http://mnarch.it/userfiles/files/99845272378.pdfIn PDF document text
    • http://igabana.com/upfolder/e/files/20210908155746.pdfIn PDF document text
    • http://lynxauto.ru/userfiles/file/mogavesijurojexo.pdfIn PDF document text
    • http://61kidsclub.com/userfiles/file/41368226009.pdfIn PDF document text
    • https://xn--p3t29jo1ed4o4xw.tw/upload/files/16211206099.pdfIn PDF document text
    • http://ayurveda-shiatsu-qigong-nice.com/upload/files/pigob.pdfIn PDF document text
    • http://studiocariola.com/userfiles/files/86233349720.pdfIn PDF document text
    • https://artistprasanna.com/userfiles/file/ranawebowezexub.pdfIn PDF document text
    • http://dostavkaturov.ru/files/file/99370031135.pdfIn PDF document text
    • http://tmkb.org.tr/ckfinder/userfiles/files/29112837312.pdfIn PDF document text
    • http://ferien-in-zahren.de/images/file/ladabeju.pdfIn PDF document text
    • https://alpinashop.bg/files/sajozez.pdfIn PDF document text
    • http://volareinmongolfiera.it/userfiles/files/7452839070.pdfIn PDF document text
    • http://lokalizacja-gps.pl/userfiles/file/49982889803.pdfIn PDF document text
    • http://heorungminhphat.com/luutru/files/3068703371.pdfIn PDF document text
    • http://lisaarkin.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/65770340711.pdfIn PDF document text
    • http://tsutae-f.com/js/upload/files/femumi.pdfIn PDF document text
    • http://studioriggio.it/userfiles/files/64390478707.pdfIn PDF document text
    • http://xn--80aab8aioy.xn--p1ai/userfiles/file/56691999827.pdfIn PDF document text
    • http://vincitydata.com/uploads/ckfinder/files/ridozu.pdfIn PDF document text
    • http://topoint.net/userfiles/fckFile/20210915140513.pdfIn PDF document text
    • http://el-master.ru/userfiles/file/taledarotuxanuvu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=how+to+change+language+on+mx+playerPDF 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_off0000b81c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB81C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d02e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD02E 16640 bytes
SHA-256: 1b37952bfcaee6edf5bee4ee2f5dc1f9686c1eaf1517fdd3a7336ecff0bc4c41
font_02_sfnt_off0000fa94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA94 10952 bytes
SHA-256: c4b2166079d386ba1b404acf338c30ebb4166a23bc07cb2fc38dccb023470c8c

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