Malicious PDF — malware analysis report

Static analysis result for SHA-256 830c47de26cd2d38…

MALICIOUS

PDF

85.2 KB Created: 2021-09-23 20:01:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 4eb02fb7b21dbdbc124ab5add38fd3d1 SHA-1: ea6fa6a76cfaf81f33281fca143d9310764ba651 SHA-256: 830c47de26cd2d38ef137aee90d3c191d1d28ededbac3b26f8139f9414f0ec3a
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and exhibits characteristics of a phishing lure, specifically targeting multi-factor authentication. The embedded JavaScript and numerous external links, including those pointing to compromised CMS uploads and disposable hosting, suggest an attempt to redirect users to malicious sites. The primary goal appears to be credential harvesting or session token theft through deceptive links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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://philabc.ru/uplcv?utm_term=source+code+apps+android PDF link annotation
    • https://traiteur-troyes-mariage-buffet-aube-10.blaisot-traiteur.fr/ckfinder/userfiles/files/19876755366.pdfIn PDF document text
    • https://sipsib.ru/wp-content/plugins/super-forms/uploads/php/files/130bcfee863ac7328369a92f84c1bbad/86312245974.pdfIn PDF document text
    • http://kanoonkaraj.ir/dbmanager/filebank/htmlgallery/file///30900200480.pdfIn PDF document text
    • http://travel-door.com/userfiles/file/zudadevojupituse.pdfIn PDF document text
    • https://maydongy.com/wp-content/plugins/super-forms/uploads/php/files/qhkm6fgumddi5d7g9nnogoss6p/kefoniba.pdfIn PDF document text
    • https://sonerofset.com/userfiles/file/bexunesebibukoviloreres.pdfIn PDF document text
    • https://beautifulhairstore.com/upload/files/xepenekukifafivuvixasut.pdfIn PDF document text
    • http://themultifold.com/wp-content/plugins/super-forms/uploads/php/files/7fvh693dvhdedd9kvtedkgt4a1/tajotozikirebaremapawasas.pdfIn PDF document text
    • http://pactolous.hu/upload/file/wanogajojatiruvimafojij.pdfIn PDF document text
    • https://beeshark.ro/app/webroot/files/userfiles/files/1394138675.pdfIn PDF document text
    • http://futureinfashion.com/ckfinder/userfiles/files/mibidejopejopaw.pdfIn PDF document text
    • http://uitvaartverzorgingsindex.nl/images/uploads/41005631311.pdfIn PDF document text
    • https://sfasg.jp/js/ckfinder/userfiles/files/93500543119.pdfIn PDF document text
    • http://nowyhotelik.pl/userfiles/file/gedopapegivirovokudume.pdfIn PDF document text
    • https://motty-etai-sharon.com/files/files/91485351137.pdfIn PDF document text
    • http://telegid.tv/userfiles/file/84956954627.pdfIn PDF document text
    • http://oroblupiscine.it/userfiles/files/ninijarenidoxubidufasa.pdfIn PDF document text
    • http://h04ydivan.ru/userfiles/file/relibolofevavotifavel.pdfIn PDF document text
    • http://coimbrasoftware.hu/images/uploads/files/74413186520.pdfIn PDF document text
    • https://allora-tour.by/var/upload/file/66810137137.pdfIn PDF document text
    • https://duproject.com/uploadEditor/files/53226796237.pdfIn PDF document text
    • http://crisismobile.com/ckfinder/userfiles/files/8348803779.pdfIn PDF document text
    • http://3duct.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141cb4b176f3---61178388195.pdfIn PDF document text
    • https://hoya.hr/UserFiles/file/xiliridugamedig.pdfIn PDF document text
    • https://www.uniqueartzz.com/wp-content/plugins/super-forms/uploads/php/files/ka2fgsrnvkmhqqki619gihmn6v/xodizipetamubedijawetir.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_off0000eaeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAEB 17168 bytes
SHA-256: 36ef1ac2d65db0b12e31130beb7f75f91e263d73b6a2e363df3340ad4cd7d93b
font_01_sfnt_off0001175e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1175E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012f75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F75 10540 bytes
SHA-256: a02c63c26a6e1029e494f075dee3a16daf59a4c3ce5a32aca73786ae8d195693

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