Malicious PDF — malware analysis report

Static analysis result for SHA-256 5225fbe0a971c962…

MALICIOUS

PDF

75.2 KB Created: 2021-09-15 12:48:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 965fc8e3e1d9e404b06f4dcc54db30f7 SHA-1: 06df759f683fffbf345c1914946a141f2cbd12f2 SHA-256: 5225fbe0a971c9622da55455e473228cea9e2ea1514347c6382911a98ce315ab
164 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://drafthe.ru/uplcv?utm_term=draw+climber+apk PDF link annotation
    • https://luiginoiobbi.com/userfiles/file/duzotewumonimimitu.pdfIn PDF document text
    • http://sameiroeventos.pt/ficheiros/nigowodosenatikobipoga.pdfIn PDF document text
    • http://italiangreyhound.pl/img1/userfiles/file/88461338444.pdfIn PDF document text
    • http://lsphc.com/userfiles/file///tepemeril.pdfIn PDF document text
    • https://renteci.com/imagens/file/fuxifumoveribavejewavot.pdfIn PDF document text
    • https://adamslakeband.org/userfiles/file/10897379976.pdfIn PDF document text
    • http://comicpapyrus.com/wp-content/plugins/super-forms/uploads/php/files/d14a5cc02305519b5ccc43aae3ae00f7/84179087367.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/tolejora.pdfIn PDF document text
    • http://krindustria.com.br/site/wp-content/plugins/formcraft/file-upload/server/content/files/1613d0fbfafc8a---dekuxibuxasapowuv.pdfIn PDF document text
    • https://lacausedeslivres.com/userfiles/file/vodixudifibipokowawakuf.pdfIn PDF document text
    • http://e2ingenieros.com/ckfinder/userfiles/files/fexulamuxemilogosomeve.pdfIn PDF document text
    • http://ingpiazza.eu/userfiles/files/xuxajinixigezivozilodeje.pdfIn PDF document text
    • https://mahanakhon.pacedev.com/ckupload/files/18346927114.pdfIn PDF document text
    • http://informerfitness.com/wp-content/plugins/super-forms/uploads/php/files/04d49f9331945f32bbf2937e62f6dd82/bakatimulapaginimojoj.pdfIn PDF document text
    • http://herbexindia.com/ckfinder/userfiles/files/37255337940.pdfIn PDF document text
    • https://recapress.com/ckfinder/userfiles/files/46261882867.pdfIn PDF document text
    • https://butagallery.com/userfiles/files/kipadalabegadazezof.pdfIn PDF document text
    • http://meandnetworking.com/ckfinder/userfiles/files/84424529221.pdfIn PDF document text
    • https://www.hs-hofgastein.salzburg.at/ckfinder/userfiles/files/lajaw.pdfIn PDF document text
    • https://fruitssupplier.com/app/webroot/img/files/melirebipuvizaz.pdfIn PDF document text
    • https://schmitz.cz/res/file/zekoxade.pdfIn PDF document text
    • https://afgventuregroup.com/cfiles/file/9225005936.pdfIn PDF document text
    • http://brenderup.ro/mm/file/17959379785.pdfIn PDF document text
    • http://www.meglobalinc.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/161330d254eb6e---13973241218.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c37d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC37D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000db8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB8F 17136 bytes
SHA-256: fc1b9518dce82976a35de7545bb2ce662d9eaf89c8dc97acbdf7ca756c6e93e6
font_02_sfnt_off0001084f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1084F 10364 bytes
SHA-256: fb23fbee0574d2f39bc10496f2e4b18cea109f9482873143f2bd287db6aa8363

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