Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2977469782708f8…

MALICIOUS

PDF

84.5 KB Created: 2021-07-19 12:09:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: ef1015d5474ac5466247c352b5826caa SHA-1: 742374dbc17c585d0a45a66629857e5d81a06d2b SHA-256: c2977469782708f823114da990b2a2b1c9c0d997fca930c691075818352eb4ec
154 Risk Score

Malware Insights

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

The PDF contains a link farm with numerous URLs pointing to domains that are either disposable or potentially compromised, as indicated by the 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' heuristics. The ClamAV detection and ML classifier also flag this PDF as malicious, likely due to its nature as a phishing or malware distribution lure. The primary attack pattern involves directing users to external resources, which could lead to further exploitation or credential theft.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5980

Heuristics 5

  • 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
  • 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 http://albino-pitti.com/pub_img/file/mavosoxutos.pdf In PDF document text
    • http://www.nanodrywash.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083b0c88c9b0---20663980533.pdfIn PDF document text
    • http://drivingschool-brno.eu/files/sobaxododapivuliviwuroda.pdfIn PDF document text
    • http://xn--80akij1ajew.xn--p1ai/wp-content/plugins/formcraft/file-upload/server/content/files/160a1b619e7964---64021401244.pdfIn PDF document text
    • http://mouaumfb.com/wp-content/plugins/formcraft/file-upload/server/content/files/160829527ed63f---xilusaja.pdfIn PDF document text
    • https://encouragingmath.com/wp-content/plugins/super-forms/uploads/php/files/8f9139fa8d59f93a0f0a52e6aa09c53d/xugabutizituvisoborabi.pdfIn PDF document text
    • http://starlightcelebre.org/clients/4/43/43e9139217482d7666ce300faf566241/File/25778777905.pdfIn PDF document text
    • http://timelessmebel.ru/wp-content/plugins/super-forms/uploads/php/files/92b171b2226be7361f5019c40cafdb4a/bipug.pdfIn PDF document text
    • https://inlandautorepairmurrietaca.com/wp-content/plugins/super-forms/uploads/php/files/68c1d66028f4f2b04b9d963d656f6aa8/javujumafigojutibas.pdfIn PDF document text
    • http://abwferrellpkwy.com/uploads/files/jorulifepemitusatuda.pdfIn PDF document text
    • http://happyhanool.com/ckupload/files/guzesido.pdfIn PDF document text
    • http://fashioncenterpoint.com/wp-content/plugins/super-forms/uploads/php/files/4e71467029e9d0b0b3946de3f2b353b1/wunewinaviropemebaj.pdfIn PDF document text
    • https://attackworkoutprogram.com/app/webroot/files/ckfinder/userfiles/files/23241856768.pdfIn PDF document text
    • http://zawayakw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d09d4056c5---bopuwiwemas.pdfIn PDF document text
    • https://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f72f1bef26---zejunewimekebopijak.pdfIn PDF document text
    • http://asianaccounting.com/admin/fckeditor/userfiles/file/desinetevurived.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160d9aa9ab9e71---99788866908.pdfIn PDF document text
    • https://wscnaturalhealings.com/wp-content/plugins/super-forms/uploads/php/files/c18a273d0d68a07daa12774782a1beb9/fuvobew.pdfIn PDF document text
    • https://www.coconutlodge.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e5eb1d8168---36180374442.pdfIn PDF document text
    • http://gewoongroen.eu/app/webroot/files/userfiles/files/faxivad.pdfIn PDF document text
    • https://washlounge.in/ckfinder/userfiles/files/bikuki.pdfIn PDF document text
    • https://kcharp.com/ckfinder/userfiles/files/35439390217.pdfIn PDF document text
    • https://cashmeredreams.com/wp-content/plugins/super-forms/uploads/php/files/1891a13332d690fe06d41d40b4b9ffd6/61114643556.pdfIn PDF document text
    • https://cafepiolho.com/uploads/assets/punanokububogoxebijomusa.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=hatching+meaning+in+tamilPDF link annotation
    • 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_off0000e51a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE51A 19220 bytes
SHA-256: 4dea714ebde2c83014fc84eebdd3cc8c538facca3a08549188a7b0fe061f72f2
font_01_sfnt_off000116e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116E2 17100 bytes
SHA-256: af6352c6d9b0e605407c38fa74e817a8d81e4c92f12c4f8e92d0996264b0d156
font_02_sfnt_off00013021.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13021 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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