Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a22287d91bdda98…

MALICIOUS

PDF

76.1 KB Created: 2021-09-14 09:54:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 41b744efeeaf36885b1fc7cc2f368214 SHA-1: 3a12cc5652e4de3fd4fca01340567e1957c15d49 SHA-256: 3a22287d91bdda98c17465fddb4882b6593a85a0b9d0d05e789e6fe2b44a754f
172 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript and multiple links pointing to potentially compromised websites, indicating a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to trick users into downloading further malware or submitting credentials. The presence of JavaScript suggests an attempt to execute code within the PDF viewer.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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
  • 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.
  • JavaScript action low 1 related finding PDF_JAVASCRIPT
    PDF contains a /JavaScript action. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://rbtyutj01.com/userfiles/files/jirugonekuvedoxirone.pdf In PDF document text
    • https://pluviaterra.mx/wp-content/plugins/super-forms/uploads/php/files/3560551261265b851ef5089224f7c1de/42772060308.pdfIn PDF document text
    • http://dj-venci.com/uploads/pages/files/sifalenetiwek.pdfIn PDF document text
    • https://mondoaudio.it/img/uploaded/file/ganaxetum.pdfIn PDF document text
    • http://agisma.ru/files/pages/files/pawoxurosumezilujizi.pdfIn PDF document text
    • https://speedwayinfo.hu/uploads/file/98987035372.pdfIn PDF document text
    • https://www.bankkartya.hu/js/ckfinder/userfiles/files/kejuw.pdfIn PDF document text
    • https://laptoptranganh.com/data/dulieu/files/nopomisatajegagoz.pdfIn PDF document text
    • http://hoangnamjsc.com/upload/files/bimaw.pdfIn PDF document text
    • https://yodishit.com/uploads/userfiles/file/82383336406.pdfIn PDF document text
    • http://belovosushi.ru/files/78966803185.pdfIn PDF document text
    • https://lorenzonimmigrationlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/161385e659958c---83972856457.pdfIn PDF document text
    • http://queuemanagementsystems.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613fa2b3c4857---segipixubomikanolulawazow.pdfIn PDF document text
    • http://tentimesneedlehill.com/UPFILE/userfiles/files/bizumigekugepu.pdfIn PDF document text
    • http://telektrans.hu/editor_up/86604542155.pdfIn PDF document text
    • http://fundacjaproartis.pl/javascript/ckfinder/userfiles/files/79610313299.pdfIn PDF document text
    • http://www.rolstoellift.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135b3d1971b7---xoberesigewokizitawu.pdfIn PDF document text
    • http://zamdq.com/filespath/files/20210913231144.pdfIn PDF document text
    • http://mkpstroitel.ru/upload/files/jiwex.pdfIn PDF document text
    • http://montpellier-business-plan.eu/mbp/upload/images/images/upload/ckfinder/4144245462.pdfIn PDF document text
    • http://eszixv.hu/ckfinder/userfiles/files/mafesisotawuloketu.pdfIn PDF document text
    • https://www.tzounakos-insurance.gr/ckfinder/userfiles/files/kikefugowividubuwevoj.pdfIn PDF document text
    • http://riskhedgetech.com/uploaded/file/235759287613c868d731c1.pdfIn PDF document text
    • https://renhedc.com/uploads/files/202109131537421935.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=set+playstore+as+defaultPDF 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_off0000c64b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC64B 10584 bytes
SHA-256: 3e052c39dec5ff4cdc8a21ca2e389ccbea7b369612da9e5e687c0fe63d651743
font_01_sfnt_off0000deab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEAB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f6bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6BD 17088 bytes
SHA-256: 31ff78f428cb54f21b74d725a9fc9a43bdd341053bd96fc83608c1407fcec52f

Open this report in the interactive analyzer, or submit your own file for analysis.