Malicious PDF — malware analysis report

Static analysis result for SHA-256 abed6ad62c83a3de…

MALICIOUS

PDF

80.6 KB Created: 2021-09-17 11:09:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: eabee88539f88785c53617cc292c1dcc SHA-1: 9b78b34160c17d8c0477d429dcaf5f2cac35c3b5 SHA-256: abed6ad62c83a3de21d8088080396ffcc717be2125b17a03a45263751c0ae300
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which are part of a link farm hosted on disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The presence of embedded JavaScript suggests an attempt to execute malicious code within the PDF viewer.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

Heuristics 6

  • 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.
  • 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://drafthe.ru/uplcv?utm_term=fallout+shelter+mod+apk+unlimited+everything PDF link annotation
    • http://apartament-krokus.pl/userfiles/file/45389392063.pdfIn PDF document text
    • http://dominant.name/userfiles/file/8559546810.pdfIn PDF document text
    • http://uleshuzatshop.hu/files/file/wuwosulonirudiguvitaraz.pdfIn PDF document text
    • https://webmodels.studio/wp-content/plugins/formcraft/file-upload/server/content/files/161331af8d6ffc---96850833043.pdfIn PDF document text
    • https://idd.no/ckfinder/userfiles/files/44732639979.pdfIn PDF document text
    • http://ziguratex.com/helpdesk/app/webroot/img/userfiles/files/72089714593.pdfIn PDF document text
    • http://eia-edu.com/userfiles/file/11126788408.pdfIn PDF document text
    • http://sinoscaform.com/upload/ckimg/files/202109141449343982.pdfIn PDF document text
    • http://kaizousha.com/js/upload/files/19184546918.pdfIn PDF document text
    • http://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/161308aa635078---noseletovitikus.pdfIn PDF document text
    • http://asiavent.com/UserFiles/file///zukotuzorufifusoku.pdfIn PDF document text
    • http://bloodfaces.de/attachment/file/rivoxageru.pdfIn PDF document text
    • https://xn--z4qq44i.tw/upload/actfiles/vakedafamasofefo.pdfIn PDF document text
    • http://realtor-madrid.com/uploades/fckeditorfile/kipanezuvilezarow.pdfIn PDF document text
    • http://linklandhotels.com/upfile/editor/files/49621517714.pdfIn PDF document text
    • http://crisismobile.com/ckfinder/userfiles/files/84362522384.pdfIn PDF document text
    • http://eventechsite.com/files/files/zuxolupo.pdfIn PDF document text
    • https://polandpools.com/contents/files/fibofadik.pdfIn PDF document text
    • http://monteconsultants.com/image/upload/File/zaziposawotutuz.pdfIn PDF document text
    • http://michaelwilliamslaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/58965482011.pdfIn PDF document text
    • http://haphadoor.com/upload/files/forisevufuzedavag.pdfIn PDF document text
    • https://www.sensormaticltd.com/app/templates/js/ckfinder/userfiles/files/bizemiwuge.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_off0000d4f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4F2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ed04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED04 17952 bytes
SHA-256: c31a659eb0b514075c79049eb5fe5bfe38684c6155318bad093f3ba88f093458
font_02_sfnt_off00011a9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A9F 11188 bytes
SHA-256: 78ed7578b75fbcb56d5eac55b730f098b9ca409ca3b3b1c9e882951c31c051c1

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