Malicious PDF — malware analysis report

Static analysis result for SHA-256 9176670d4ba4414b…

MALICIOUS

PDF

84.3 KB Created: 2021-09-08 00:25:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 2ce7e59792a9fa2d53f577c488b1020c SHA-1: 8fbbed8e77813ead4ba6da5b00e1b9fbbe44cb51 SHA-256: 9176670d4ba4414bf3ea0c5be535bc7097366feb258895187df6d7e6b30a6043
196 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a social engineering attack (ClickFix). The document likely aims to deceive users into running commands, as indicated by the SE_CLICKFIX heuristic, which is a common method for downloading and executing further malicious content. Multiple URLs pointing to potentially compromised WordPress sites and disposable hosting were extracted, suggesting a distribution mechanism for secondary payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://mrybalko.ru/files/gezelijavowefigabaxes.pdf In PDF document text
    • http://monkey-do.net/userfiles/file/77950058490.pdfIn PDF document text
    • http://verkoop-je-wagen.be/wp-content/plugins/formcraft/file-upload/server/content/files/16091be8e6f369---gixizarudenigagu.pdfIn PDF document text
    • http://studiomarazzi.eu/userfiles/files/48918414628.pdfIn PDF document text
    • http://www.nbrownies.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16091a51a5b293---buxukelo.pdfIn PDF document text
    • https://veglifekc.org/wp-content/plugins/super-forms/uploads/php/files//89432075032.pdfIn PDF document text
    • https://limpjet.com.br/wp-content/plugins/super-forms/uploads/php/files/8657bec626bf0e2c6d322204d8819468/jogagufatelozufe.pdfIn PDF document text
    • https://aashianarealty.com/file/59138794791.pdfIn PDF document text
    • http://dietaltop.com/userfiles/files/jekekizesezidoxovu.pdfIn PDF document text
    • https://edgecs.com/documents/10832075140.pdfIn PDF document text
    • http://longarmquiltacademy.com/fckeditor/userfiles/file/tozifizatewewetabukezu.pdfIn PDF document text
    • https://showdetango.com/bafa/userfiles/file/62995462422.pdfIn PDF document text
    • https://ccveg.org/wp-content/plugins/super-forms/uploads/php/files/kfb7bjgh2sc8tsdipeetpma1lb/54604653002.pdfIn PDF document text
    • http://elcampoeco.org/FCKeditor/file/45099721475.pdfIn PDF document text
    • https://masterpieces-mallorca.com/wp-content/plugins/super-forms/uploads/php/files/45b0fd1f5ed3ae621f2a06ca192fddf2/moxovijap.pdfIn PDF document text
    • https://www.projectorrentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607abfae05626---34889521211.pdfIn PDF document text
    • http://dent-pro.cz/pic/file/99652758972.pdfIn PDF document text
    • http://www.apsetedavisi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607235f3ba43e---81397384365.pdfIn PDF document text
    • http://pantryscan.com/123cars/imagefck/file/palasajenamoto.pdfIn PDF document text
    • http://mamnonlittlesun.com/upload/files/4211223450.pdfIn PDF document text
    • http://akkoryazilim.com/userfiles/file/wezagidij.pdfIn PDF document text
    • http://pcmcpropertyblog.com/wp-content/plugins/super-forms/uploads/php/files/56d68b2f99366a6e2bb1b397ae141b07/6856502165.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=best+free+pdf+scanning+software+for+windows+10PDF 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_off0000e480.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE480 11060 bytes
SHA-256: 7c90e317cda4f351470838982de2f7234ce0b48884c1ca0e2fa9942e129c69e8
font_01_sfnt_off0000fe59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE59 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001166b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1166B 17300 bytes
SHA-256: 2c682c5472f40361559494483252718c3f348639b923e628352a4e5001ce743f

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