Malicious PDF — malware analysis report

Static analysis result for SHA-256 6fe9183608956909…

MALICIOUS

PDF

81.5 KB Created: 2021-09-14 01:22:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: f14ea25de34cb82ca7544ee07fa7a338 SHA-1: fbb4058891bf6d511441781d810d46d265eae67d SHA-256: 6fe91836089569097260be7891433af347620e8febf1191f7779b1884ce3d220
196 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. The 'SE_CLICKFIX' heuristic indicates social engineering, instructing the user to execute a command, likely to bypass macro restrictions and download a secondary payload. The numerous embedded URLs, many pointing to compromised CMS upload directories, suggest a link farm designed to host or redirect to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • 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.
  • 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://www.ftha.org/admin/ckfinder/userfiles/files/podevogixivaju.pdf In PDF document text
    • http://kimsanghun.com/upload/userfiles/file/202199235524421.pdfIn PDF document text
    • https://www.americanapi.com/wp-content/plugins/formcraft/file-upload/server/content/files/161336e5627aa5---36029270077.pdfIn PDF document text
    • https://nnt52.ru/userfiles/file/70696818409.pdfIn PDF document text
    • https://chicagoportablexray.com/wp-content/plugins/formcraft/file-upload/server/content/files/161356524e6c51---raguduwubelidopoxowum.pdfIn PDF document text
    • http://smithmurdock.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f40ea46b60---zabudugosetalo.pdfIn PDF document text
    • http://dreamsurgerycn.com/ckupload/files/nademajetudibopexiz.pdfIn PDF document text
    • http://istihdamhaberleri.com/upload/ckfinder/files/rekufonaxer.pdfIn PDF document text
    • http://silesiacapital.eu/data/file/72532714106.pdfIn PDF document text
    • http://www.auditsi.com/wp-content/plugins/formcraft/file-upload/server/content/files/161308d1905f6e---44591254141.pdfIn PDF document text
    • https://benhgout.net/uploads/Files/file/75414455497.pdfIn PDF document text
    • http://internet-trade.cz/UserFiles/file/26355059833.pdfIn PDF document text
    • https://odlingfamily.com/userfiles/file/likezubonaburudiwuvamulem.pdfIn PDF document text
    • http://se-ty.com/uploads/userfiles/file/14765058554.pdfIn PDF document text
    • https://www.davidcosz.de/wp-content/plugins/super-forms/uploads/php/files/73sggbm14vak67edh6i5u0ni04/gusafulabago.pdfIn PDF document text
    • https://siam-royal-view.ru/data/files/kixemala.pdfIn PDF document text
    • https://ozora.schaffsen.com/contents/file/dutigevivurufuk.pdfIn PDF document text
    • https://happycolaborativo.com/uploads/files/48989907004.pdfIn PDF document text
    • http://zespolbahamas.pl/zdjecia/file/44781215076.pdfIn PDF document text
    • http://matchedtubes.de/userfiles/file/fomidiju.pdfIn PDF document text
    • http://socialbomjesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/16138dc270388f---ridenuwiwewusozexevev.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=mount+my+sd+cardPDF link annotation
    • http://zs.tom.ru/jsplugins/ckfinder/userfiles/files/jifiludoworotal.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_off0000db4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB4F 10468 bytes
SHA-256: 163ad7d45867866bb3c10472e3dc53cb5d9ea2557bc5ca417aaf356d13864a35
font_01_sfnt_off0000f321.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF321 17592 bytes
SHA-256: 914169d0df6158dadb6da54b061abf50e8f16e79b0f2961edf578058f355d759
font_02_sfnt_off000120bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120BB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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