Malicious PDF — malware analysis report

Static analysis result for SHA-256 97211cfd8c8a140b…

MALICIOUS

PDF

72.7 KB Created: 2021-09-23 03:28:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 2894cacfb16220bb7c5e4f34c01eb4fc SHA-1: 4412f7bcf0022077eb03ce90d752518d58797503 SHA-256: 97211cfd8c8a140be3233fc6074cca6c2e7f094acc5fffaed8951bcdf1c168d7
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The file contains embedded JavaScript and numerous external URIs, many of which point to compromised websites or disposable hosting, suggesting it's designed to redirect users to malicious content. The presence of JavaScript and the nature of the URLs indicate an attempt to exploit vulnerabilities or deliver further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://allytemp.ru/uplcv?utm_term=how+to+read+the+unsent+message+in+messenger PDF link annotation
    • http://pizzeriagiganti.ro/imagini_ws/46240431800.pdfIn PDF document text
    • http://1yunnan.com/ckfinder/userfiles/files/musepixadanurezovoneb.pdfIn PDF document text
    • http://artechq8.com/beta/uploads/files/61937860682.pdfIn PDF document text
    • https://ivfnna.gr/wp-content/plugins/super-forms/uploads/php/files/6d583f4cbb61d2fc8a49e55d36f54621/40233837004.pdfIn PDF document text
    • http://stihoplet.by/upload/editor/files/3563958719.pdfIn PDF document text
    • https://weborder.cloud/userfiles/file///32631364520.pdfIn PDF document text
    • http://xn----8sbfeahwarn6ac1adp3fb2p.xn--p1ai/userfiles/file/wopivuvaxi.pdfIn PDF document text
    • https://tunguoilon.tunhua.vn/ipp/images/uploads/files/sozexabebekedepugux.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a2ead3a537---wajudanazunavupape.pdfIn PDF document text
    • http://kiajihlava.cz/UserFiles/File/7818551187.pdfIn PDF document text
    • http://www.jesuseslaroca.org/wp-content/plugins/formcraft/file-upload/server/content/files/16142f7264493d---robam.pdfIn PDF document text
    • http://www.sg-callenberg.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613753318a240---76878819404.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/cmddb7j5cs7dvl6d6lvsa3ieev/duvijuwi.pdfIn PDF document text
    • https://robertmatzuzi-massagetherapist.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/161368baf5911f---51910249249.pdfIn PDF document text
    • http://elrey-uslugi.ru/media/file/57959679750.pdfIn PDF document text
    • http://say-international.eu/userfiles/file/jidodi.pdfIn PDF document text
    • https://ap-qatar.com/userfiles/files/watekajekaxidejotij.pdfIn PDF document text
    • https://popa.com.br/wp-content/plugins/super-forms/uploads/php/files/d2b5ea2a128eaf315a038f9f267be3d2/kenufitomenekodefi.pdfIn PDF document text
    • http://kmjmt.com/news/upload/file/210922040227744365gxp2w5.pdfIn PDF document text
    • http://stcforanebanglore.smcim.com/www/js/ckfinder/userfiles/files/kikovamidokedinisulala.pdfIn PDF document text
    • https://kabelkyaobuv.sk/editor_uploads/files/10158934952.pdfIn PDF document text
    • http://windcampus.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613f67c5a9a3a---wikale.pdfIn PDF document text
    • https://milliondollardesiclub.com/upload_files/featured/files/sorowojemopidavonipisaze.pdfIn PDF document text
    • http://www.findvoters.com/userfiles/file/gemamokazosetatisa.pdfIn PDF document text
    • http://thepnguyentran.com/media/ftp/file/wepemolokapatotulewonefug.pdfIn PDF document text
    • https://robertmatzuzIn macro / runtime command snippet
    • 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_off0000bb03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBB03 16144 bytes
SHA-256: ce696f36b96a3ea3fc91961288533143b6191b34c29c947eba921b2675cf5cf7
font_01_sfnt_off0000e429.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE429 10824 bytes
SHA-256: 10e23327acaceb80d6b1f14f63c0fee19925a5ef43bb6f95de643ade06626c81
font_02_sfnt_off0000fcbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCBB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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