Malicious PDF — malware analysis report

Static analysis result for SHA-256 e294f512a0ef6325…

MALICIOUS

PDF

88.8 KB Created: 2021-09-04 05:45:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: b76260a15413664b09b7b095a923880b SHA-1: 073e70c1da96a9f21d1346edc0eb871aaee5341e SHA-256: e294f512a0ef632527f39356cf14a4bd0b120b190b5e069aff9ca9001ec32155
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs pointing to potentially compromised websites or link farms, suggesting a phishing or redirection scheme. The presence of PDF-specific heuristics like 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' and 'PDF_SEO_DISPOSABLE_LINK_FARM' further supports this, indicating the PDF is part of a campaign to host malicious content or phish users. No scripts were extracted, but the overall structure and URL distribution point to a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://ketchas.ru/uplcv?utm_term=the+evolving+trend+of+kidnapping+in+nigeria+pdf PDF link annotation
    • http://savannahcentury.info/clients/4/44/449a5b3489ef279447e90cf6cdd72f1c/File/libil.pdfIn PDF document text
    • https://sf-tfi-pgu.uz/wp-content/plugins/super-forms/uploads/php/files/8feba705a6659bd5294e062643d933ac/fuxuvixola.pdfIn PDF document text
    • http://rcp-ranstadt.us/files/97270242856.pdfIn PDF document text
    • http://ahsaipu.com/v15/Upload/file/2021521013237682.pdfIn PDF document text
    • http://www.virtualaid.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160da29d710c12---78779010979.pdfIn PDF document text
    • https://accidentmatters.com/ckfinder/userfiles/files/51661613145.pdfIn PDF document text
    • http://aimic.com/userfiles/file/jetaveponibogex.pdfIn PDF document text
    • http://weberstellen.ch/userfiles/file/fulolusul.pdfIn PDF document text
    • http://samafb.org/uploadfilefiles/24354748450.pdfIn PDF document text
    • https://readxyz.org/wp-content/plugins/super-forms/uploads/php/files/4eb8b39a3ea6e957eba9acd41900e0d6/55904790532.pdfIn PDF document text
    • https://www.adler-leitishofen.de/wp-content/plugins/formcraft/file-upload/server/content/files/160d4f2f412021---83055248600.pdfIn PDF document text
    • http://nwatchonline.info/userfiles/file/lumeladiv.pdfIn PDF document text
    • http://www.nbrownies.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608d369da8de4---81024624881.pdfIn PDF document text
    • http://anpharma.net/upload/files/26506323296.pdfIn PDF document text
    • http://cedresarquitectura.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cf104a6d65---91296242882.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160acab6f01a28---11500268682.pdfIn PDF document text
    • https://infoenergie-loire.org/userfiles/file/97240372996.pdfIn PDF document text
    • http://fabriziocar.it/userfiles/files/junasafo.pdfIn PDF document text
    • http://stylist.in.ua/wp-content/plugins/formcraft/file-upload/server/content/files/16080dd8179d97---46923283680.pdfIn PDF document text
    • https://www.3dreamchurch.com/wp-content/plugins/super-forms/uploads/php/files/74a8e94399b107ac2a272d3a3d26cab2/wijidaginubonamapul.pdfIn PDF document text
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/e4efcf4630e4d7492eaf6be7e6e22148/57549524071.pdfIn PDF document text
    • https://evergreencans.com/userfiles/file/87175006058.pdfIn PDF document text
    • https://lerong.vn/wp-content/plugins/super-forms/uploads/php/files/5d5c7360db2c5570d8b1dfb641c99587/vopiwirenetusi.pdfIn PDF document text
    • http://www.jesuseslaroca.org/wp-content/plugins/formcraft/file-upload/server/content/files/16082b00920f5d---25690681806.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
    • 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_off0000f6da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6DA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010ef1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EF1 10732 bytes
SHA-256: a0a4ea681acf05428aeeb7e2d36939f7b656d95dece4e7b6f233315799dba51f
font_02_sfnt_off00012753.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12753 17760 bytes
SHA-256: 0423a566d87c32f00c7cfbcb141818ef5ef076181d711cd185fd3b9eb0a993c4

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