Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d0785f202b3f0c7…

MALICIOUS

PDF

82.5 KB Created: 2021-09-08 07:31:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 948d9c952650e30ac92e36f1e20abd0a SHA-1: a5107cc8a369615e8ce2ed011407a416cd7e1553 SHA-256: 1d0785f202b3f0c73e84f6a6b324bb4f7afbdb48cb87fa6d08fdf8bdaac16044
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 a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains a link farm pointing to numerous domains, many of which are hosted on compromised CMS upload storage or disposable hosting, suggesting an attempt to distribute malicious content or phish for credentials. The presence of external URIs and link farms indicates a likely spearphishing attachment attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

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://sardavetri.it/userfiles/file/37137988486.pdf In PDF document text
    • http://secohthailand.com/file_media/file_image/file/45081672763.pdfIn PDF document text
    • https://traveltokiev.com/wp-content/plugins/super-forms/uploads/php/files/ijs0q511clare4uq7obc2b8984/kutixakikezuwalez.pdfIn PDF document text
    • https://rffsev.ru/wp-content/plugins/super-forms/uploads/php/files/12741c62c36bffa724b96eb35c6748c2/17725191658.pdfIn PDF document text
    • http://abeess.com/userfiles/file/rukilerapagisozelu.pdfIn PDF document text
    • http://expertcomptablecourreges.fr/michel_courreges/userfiles/file/zifinapuluwexadex.pdfIn PDF document text
    • https://liniagdanskzydowo.pl/files/42947845384.pdfIn PDF document text
    • http://cobansut.com/userfiles/file/30649509630.pdfIn PDF document text
    • http://abpaluso.com/upload/file/24252526162.pdfIn PDF document text
    • http://short-story.ru/upload/file/9063553741.pdfIn PDF document text
    • https://genesisbehaviorcenter.com/wp-content/plugins/super-forms/uploads/php/files/f4b9fb7b19da8e863aeb2fa32c22ffc8/surivigapumo.pdfIn PDF document text
    • https://dangeloremodeling.com/nbloom/fckuploads/file/44852977575.pdfIn PDF document text
    • http://glovimex.com/uploads/ckfinder/files/xuxipovetuxatunizulixazo.pdfIn PDF document text
    • http://manufim.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160a233207197f---75717723126.pdfIn PDF document text
    • https://sieseam.org/userfiles/files/74517517651.pdfIn PDF document text
    • http://www.anjhimayath.com/upload/file/87552167782.pdfIn PDF document text
    • https://lakeshoresmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/mi286n7gn1pv43gpj1cva07n94/27420193373.pdfIn PDF document text
    • https://genericdiabeticteststrips.com/userfiles/files/pebibuvujilerutome.pdfIn PDF document text
    • http://www.sensible-seeds-premium.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085fc787709d---36548292253.pdfIn PDF document text
    • https://villanakarin.com/userfiles/files/rufosurilumugiweluruvel.pdfIn PDF document text
    • http://commandhousecreations.com/uploads/files/gulegapodetejonev.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=2008+volkswagen+passat+komfort+owners+manualPDF 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_off0000dc84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC84 11304 bytes
SHA-256: b38941cc5a485b829f2739cf3b22e952e202d806f0cdb3d1c220610841f6bca1
font_01_sfnt_off0000f738.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF738 17544 bytes
SHA-256: 406639f369e0ceaee8fcfb3f08189becc354d9ec0675032929003f7bb1d9b5d0
font_02_sfnt_off000124a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124A6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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