Malicious PDF — malware analysis report

Static analysis result for SHA-256 39c5691bc57e612d…

MALICIOUS

PDF

85.8 KB Created: 2021-10-08 17:17:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 24a93faf5b24005a5fbb5391b261052c SHA-1: fcecdacdf17de11b0898e003573d010e5301588b SHA-256: 39c5691bc57e612d615f495191efc8296a7aada825ada3dfaa4aa52cc449d08a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many pointing to compromised websites or disposable hosting, indicating a link farm or redirection strategy. ClamAV and ML classifiers identified this PDF as malicious, specifically flagging it as a phishing or trojan variant. The presence of embedded URLs and the overall structure suggest an attempt to direct users to malicious content, likely as part of a phishing campaign or to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 6

  • 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.
  • 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=trading+quest+link%27s+awakening PDF link annotation
    • https://fpcofmacon.com/nbloom/fckuploads/file/fedexolekumoja.pdfIn PDF document text
    • https://inlandautorepairmurrietaca.com/wp-content/plugins/super-forms/uploads/php/files/590066230cbc74f98628687395256e1d/zivamowagoziribe.pdfIn PDF document text
    • http://runwellconsulting.eu/file/file/pupaduxizorulaxo.pdfIn PDF document text
    • http://lunaleo.pl/userfiles/file/98403577937.pdfIn PDF document text
    • http://churchliferesources.org/wp-content/plugins/formcraft/file-upload/server/content/files/16136d5a5c4f13---vosibovamobomatowugobopif.pdfIn PDF document text
    • http://tomdythai.com/userfiles/files/mufafumigaz.pdfIn PDF document text
    • http://juha.be/_files/file/dosasevebos.pdfIn PDF document text
    • http://prvugkh.ru/uploads/files/81193455822.pdfIn PDF document text
    • http://www.premiumimport.nl/ckfinder/userfiles/files/27884631974.pdfIn PDF document text
    • http://kapsalonvogue.nl/files/file/30896998277.pdfIn PDF document text
    • http://hgbs.de/userfiles/file/20045765901.pdfIn PDF document text
    • http://www.commandinglife.com/wp-content/plugins/formcraft/file-upload/server/content/files/161495b433c8bf---77000708393.pdfIn PDF document text
    • https://thaiahpa.com/flash/files/60030894362.pdfIn PDF document text
    • http://khodahoanglang.com/admin/webroot/upload/image/files/19374476210.pdfIn PDF document text
    • http://paitoonbox.com/userfiles/files/36023190966.pdfIn PDF document text
    • https://rabudiagnostic.com/userfiles/files/mojogalazevimevezetafa.pdfIn PDF document text
    • http://worldtile.net/jangheung/userfiles/file/pozefelab.pdfIn PDF document text
    • http://www.socfertenviron.org/cmsfile/contentfiles/xubafunekakekala.pdfIn PDF document text
    • https://acatay.daynexdemo.tk/upload/ckfinder/files/ralelevugonovopin.pdfIn PDF document text
    • https://ourguarantees.com/userfiles/file/12357450497.pdfIn PDF document text
    • http://rjbmachinery.com/d/files/61725460490.pdfIn PDF document text
    • http://ansatrans.ru/admin/ckfinder/userfiles/files/28492632669.pdfIn PDF document text
    • http://truhlarstvisollner.cz/data/file/wodiva.pdfIn PDF document text
    • http://kayapalinakliyat.com/file/newanemovitov.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_off0000e97c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE97C 10724 bytes
SHA-256: 452bf9457b8dde3592477810a31b6fc4a48322cad045503639662b9af5a36f45
font_01_sfnt_off000101cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101CD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000119df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119DF 18304 bytes
SHA-256: e478c6ab3ad3c7049fe41cd84941bcc9f55219efb573348f017a02f44bd1cb09