Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2baceff455dc0b6…

MALICIOUS

PDF

84.8 KB Created: 2021-09-13 05:04:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 2f08b207f3017ea12288847d1b9c838f SHA-1: 053cf8c65834b6d1c195171faad313f6660e37f0 SHA-256: f2baceff455dc0b6c54900a3066ef7cef6da41b7ab8defe68479d976410aa909
156 Risk Score

Malware Insights

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

The PDF file contains numerous links, many of which point to websites hosted on compromised CMS platforms or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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://idroilektriki.gr/files/file/dumilekororemeseboxisef.pdf In PDF document text
    • https://cecprint.com/images/file/63896715839.pdfIn PDF document text
    • http://foire-fromages-et-vins.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612fc0b33a2b7---33219769399.pdfIn PDF document text
    • https://preciseenergygroup.com/media/muwolararafetivi.pdfIn PDF document text
    • http://misr-consult.com/userfiles/file/rugurazasejozekave.pdfIn PDF document text
    • http://chinahongji.com/d/files/rowamokexa.pdfIn PDF document text
    • http://xn--b1agjlwjc3g.xn--p1ai/ckfinder/userfiles/files/xubik.pdfIn PDF document text
    • http://sirindhorn.net/upload/File/semuvuze.pdfIn PDF document text
    • http://ipublicity.cz/data/file/10240449142.pdfIn PDF document text
    • http://ybshajiang.com/userfiles/file/2021-09-08/210908051506935329fh4zxswy3bof.pdfIn PDF document text
    • http://www.coverseg.com/uploads/ckfinder/files/5647481835.pdfIn PDF document text
    • http://swancentive.com/cote_dor_import/admin/ckfinder/userfiles/files/jaximumoxisinavizuk.pdfIn PDF document text
    • https://www.elektrobetrieb-scholz.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613e0c581c235---78714934089.pdfIn PDF document text
    • http://checopharma.com/upload/files/kopaparokamiwoveme.pdfIn PDF document text
    • https://doluhosting.com/calisma2/files/uploads/wijovototajazowoninukuna.pdfIn PDF document text
    • http://thenikharvconsultancy.com/userfiles/file/xigub.pdfIn PDF document text
    • https://edinburghpools.com/contents/files/pifozejase.pdfIn PDF document text
    • http://www.findvoters.com/userfiles/file/83625128094.pdfIn PDF document text
    • http://dtjxbpzx.com/filespath/files/20210908074840.pdfIn PDF document text
    • http://89928386.com/uploads/files/202109052333568938.pdfIn PDF document text
    • https://cncostruzioni.com/userfiles/file/9583707945.pdfIn PDF document text
    • http://www.onekaddy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a239522912---titurasuxak.pdfIn PDF document text
    • http://sarljarry.fr/userfiles/file/83163448382.pdfIn PDF document text
    • https://kolodezrus.ru/wp-content/plugins/super-forms/uploads/php/files/86db95bf6ee17a21000b597445452372/97285730104.pdfIn PDF document text
    • https://levin-dent.ru/wp-content/plugins/super-forms/uploads/php/files/1db890836f34e6008eee1ac5b0d2156c/dulolisusibejeka.pdfIn PDF document text
    • http://firewheels.pe/userfiles/file/mozijulon.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=ig+flash+instagram+auto+likerPDF 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_off0000e664.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE664 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fe76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE76 17588 bytes
SHA-256: 7aa0bc6137a46ff1019e04879e1f49f0893414a678c0b4fd4e6d7e5ecd8e9e40
font_02_sfnt_off00012c4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C4F 10804 bytes
SHA-256: 8b2ade59937bd527cc39b3f26d9673f809020646a8427557c05e5914de8a9660

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