Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f567ed7070cecfe…

MALICIOUS

PDF

73.1 KB Created: 2021-07-30 21:16:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: aceb0c7fcd30f15b5c224bdba552c230 SHA-1: 64a97e54bcb3304e015e84f323c9e7f5e15c57ec SHA-256: 4f567ed7070cecfe8abbf496eb0570bd244e2bbba314c673219c3e3c0bff6cb2
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier with high confidence. It contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable hosting, suggesting a link farm designed to redirect users. The presence of external URIs and the nature of the heuristics indicate the file's primary purpose is to lead users to malicious sites, likely for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://philabc.ru/uplcv?utm_term=denis+minecraft+troll+map PDF link annotation
    • http://eksan-ltd.com/userfiles/file/gapeninoz.pdfIn PDF document text
    • https://promocionesnma.com/wp-content/plugins/super-forms/uploads/php/files/09461af42668237775494ce4ad362f7d/1648579315.pdfIn PDF document text
    • http://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc2ca35846---rigegedamepirekuton.pdfIn PDF document text
    • http://fsoa.cn/userfiles/file/mozezalavo.pdfIn PDF document text
    • http://healthywithhart.com/res/file/92265463365.pdfIn PDF document text
    • http://gz-theoutfit.com/UploadFiles/FCKeditor/20210625103243.pdfIn PDF document text
    • http://jingluo.net/uploadfiles/files/jilovep.pdfIn PDF document text
    • https://boldvision.tv/wp-content/plugins/formcraft/file-upload/server/content/files/160ce53d43480f---kuzezuvefil.pdfIn PDF document text
    • https://nam.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607d081378762---44526831581.pdfIn PDF document text
    • http://artospace.com/pics/file/pidinazuvogazusux.pdfIn PDF document text
    • http://sensi-leszno.pl/userfiles/file/fadulagu.pdfIn PDF document text
    • http://jenan.com/ckfinder/userfiles/files/pugesijuxex.pdfIn PDF document text
    • http://gesundimjob.at/images/content/files/fiturokodurelu.pdfIn PDF document text
    • https://medsplus.us/admin/images/file/lusujovuduxaguzujotiwezip.pdfIn PDF document text
    • http://sugarfree-gelato.com/upload/file/sikelez.pdfIn PDF document text
    • https://cmflower-kkc.com/ckfinder/userfiles/files/kiwuxoz.pdfIn PDF document text
    • http://85560891.com/upfolder/e/files/20210708060835.pdfIn PDF document text
    • http://www.anclupnapoli.it/userfiles/file/womemilaraduforaboxek.pdfIn PDF document text
    • http://acecaalcoy.com/userfiles/file/14477965971.pdfIn PDF document text
    • http://alexhofford.com/temp/files/file/solevab.pdfIn PDF document text
    • http://numismatika-nbkpdy.cz/userfiles/file/38730257486.pdfIn PDF document text
    • https://aliencosmicexpo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d1dd1368385---90265504111.pdfIn PDF document text
    • http://luckyassessoria.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160adfafd2a101---44947988847.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
    • https://apple.co/2pAGE7WIn 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_off0000b9b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB9B6 16564 bytes
SHA-256: ea4ff0758fcb73728fb7a968729bd3ee996da7f4c4ee6f09038db20846970793
font_01_sfnt_off0000e51b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE51B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fd32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD32 10644 bytes
SHA-256: 4e9dcdfc3a7215e6e1275fea9c3dfc3ec3d1abf3b1adfb0431fd6e90cc714bb2

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