Malicious PDF — malware analysis report

Static analysis result for SHA-256 9fe2ea49f4b7d93a…

MALICIOUS

PDF

83.9 KB Created: 2021-09-14 12:15:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: ae3c77d15596e1e3064df3a599ba983b SHA-1: 145b41b365472676fbb52ce7a72ce9aa66c503bf SHA-256: 9fe2ea49f4b7d93aca75d25bf5ae8a93920aacbb56a5a86259e7fd304d34db37
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains a link farm pointing to numerous compromised websites and disposable hosting, suggesting an attempt to redirect users to malicious content. The presence of multiple external URIs and the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic indicate a strong likelihood of phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://chocoinmobiliario.com/wp-content/plugins/super-forms/uploads/php/files/dc2e719799404e549b54883a7ba219bf/zifazizorefefezibixo.pdf In PDF document text
    • https://repairbase.net/FCKeditor/editor/filemanager/connectors/php/images/file/vifewolufa.pdfIn PDF document text
    • https://gilbertems.com/videos/file/2187308498.pdfIn PDF document text
    • http://healthywithhart.com/res/file/84756998798.pdfIn PDF document text
    • http://renknh.com/ckupload/files/kekaxe.pdfIn PDF document text
    • http://abw10thstreetne.com/uploads/files/69302841715.pdfIn PDF document text
    • https://www.lumisolar.pe/wp-content/plugins/formcraft/file-upload/server/content/files/161347a765887e---37065287888.pdfIn PDF document text
    • http://location-venise.com/italie_documents/files/14252647282.pdfIn PDF document text
    • http://rybarict.cz/webpagebuilder/ckfinder/userfiles/files/36754665405.pdfIn PDF document text
    • http://metisentry.net/ckfinder/userfiles/files/xejatozerizegemolagexopun.pdfIn PDF document text
    • https://koltoztetes-szallitas-lomtalanitas.com/ckfinder/userfiles/files/didasitutevoxitebuvomamo.pdfIn PDF document text
    • https://srldirect.com/ckfinder/userfiles/files/74764961514.pdfIn PDF document text
    • https://cms.blauraum.com/wp-content/plugins/super-forms/uploads/php/files/1ce7754b1a9ca60de5e9399cb01459ea/6992024733.pdfIn PDF document text
    • http://mediacast.vn/ckeditor/upload/files/15041107069.pdfIn PDF document text
    • http://rasmesafar.net/basefile/basefiles/jiwinopotegedajawi.pdfIn PDF document text
    • https://backcountryplayground.com/wp-content/plugins/super-forms/uploads/php/files/aa33da909fdc6c4d205ade85bb56f470/wezeledifolo.pdfIn PDF document text
    • http://bebsulmare.com/userfiles/files/wururawetakolozeg.pdfIn PDF document text
    • http://jd6618.com/jd6618/file/2021-9/file/LwpCms2021_09_08_10_31_57_9722.pdfIn PDF document text
    • http://www.inhd.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16136b9c1b8218---54258826222.pdfIn PDF document text
    • https://mpksieradz.pl/upload/file/jodibodarofoj.pdfIn PDF document text
    • http://reylab.com/userfiles/file/mezunaf.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=frostgrave+rules+pdfPDF 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_off0000e6f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6F5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ff0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF0C 10620 bytes
SHA-256: 21cc26c18cb6b0dcc30db12b00548c09f184243f3315b6a33ccd80d38ea0c25b
font_02_sfnt_off00011754.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11754 16720 bytes
SHA-256: 04be2370b4f91c241858e590cb9cabf25fc482ee494ca0781f8b435973172b8b

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