Malicious PDF — malware analysis report

Static analysis result for SHA-256 11d26e9da06625da…

MALICIOUS

PDF

101.2 KB Created: 2021-06-27 16:02:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 9e2ddd69031e16c47266b47c2c5e7019 SHA-1: 959f39b658bc2e55b6b201d6d534367d732d5f36 SHA-256: 11d26e9da06625da74d86e46e0b0072bd30770b596b43a28786a7b2db9fb4ae4
156 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to multiple compromised CMS upload directories, suggesting an attempt to distribute further malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. The embedded URLs are designed to lure users into clicking on potentially harmful files.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9899

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://weblative.com/wp-content/plugins/super-forms/uploads/php/files/4gv7p6otq0uii4fr315493n6qo/37955913013.pdf In PDF document text
    • http://www.zopfitravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0f1910b914---68722466372.pdfIn PDF document text
    • https://www.bluegreenshouseboats.in/wp-content/plugins/formcraft/file-upload/server/content/files/16076114b06757---28673078458.pdfIn PDF document text
    • http://lindseyderence.com/userfiles/files/fobuwasi.pdfIn PDF document text
    • http://c2mag.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9b1409e1bb---sawaxite.pdfIn PDF document text
    • http://domeinbeverdonk.be/assets/files/file/tapelevetulax.pdfIn PDF document text
    • https://regeneracion-capilar.com/wp-content/plugins/super-forms/uploads/php/files/b0d807aeca39a1bad66825de7cfeec46/rerosovuzajilezowukukox.pdfIn PDF document text
    • http://criollo-cocoa.com/userfiles/file/nolasorisiferozozozajopob.pdfIn PDF document text
    • https://dispomydeal.com/wp-content/plugins/super-forms/uploads/php/files/d4f12dcf2355950a31ebc4edfb79dce9/zifadigolagese.pdfIn PDF document text
    • https://www.okcfarmersmarket.com/wp-content/plugins/super-forms/uploads/php/files/93c387681c981d36d7e2158e6a062696/63495605599.pdfIn PDF document text
    • https://wacee.net/wp-content/plugins/formcraft/file-upload/server/content/files/160957fab87f97---90736887580.pdfIn PDF document text
    • http://zonweringbelgie.eu/ckfinder/userfiles/files/vovudamutixosebago.pdfIn PDF document text
    • http://titusrelay.com/clients/e/ef/ef304ccc03541e9e6382bef5f13b0a7d/File/20908744195.pdfIn PDF document text
    • http://xn--h49al33a2zdp0eo1x.com/DATA/file/20210612101315.pdfIn PDF document text
    • http://oilmachineydy.com/d/files/jijawin.pdfIn PDF document text
    • https://cspdental.com/wp-content/plugins/super-forms/uploads/php/files/10cd19009b2635ef41343073dfaa5361/17856318565.pdfIn PDF document text
    • http://zabradli-znerezu.cz/userfiles/file/diwivamodiribe.pdfIn PDF document text
    • http://slippersymposium.com/clients/875641/File/32694577892.pdfIn PDF document text
    • http://dungcucaytrong.com/images/files/titeluxojulu.pdfIn PDF document text
    • https://www.actionconstructionjax.com/wp-content/plugins/super-forms/uploads/php/files/ee05df2b9092406cc747f4a9556e6ec9/gafetexa.pdfIn PDF document text
    • https://cutletsmeat.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ad5c0d0f0a---rikarejewetanemafozu.pdfIn PDF document text
    • https://led7.ru/file/lusovezosupolupogipojero.pdfIn PDF document text
    • https://cashmeredreams.com/wp-content/plugins/super-forms/uploads/php/files/f43c0eaa093535f0edef2d823e53d876/sopizejavezu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=instagram+followers+increase+free+trialPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011042.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11042 16164 bytes
SHA-256: fd494554c7a7a2c4488382a78096c535ff133766c7221992be4f6a58596b2467
font_01_sfnt_off000125b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125B4 17792 bytes
SHA-256: d146d9efe58f355cdc84374de77dc9fa8980ad38b4558e30cb6a946d1b1a5623
font_02_sfnt_off00015441.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15441 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00016c58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16C58 10716 bytes
SHA-256: 995944093b59f8541df6587be1092f96122d8698e835309ad23d673ebe6f7874

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