Malicious PDF — malware analysis report

Static analysis result for SHA-256 e32d9f207dd9b164…

MALICIOUS

PDF

84.0 KB Created: 2021-09-07 03:31:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: ee7a6f454c5112cae979e253be4e2f80 SHA-1: bef6cbfe4e3f62a05ebd45e58c20e62d873aac3e SHA-256: e32d9f207dd9b164d005e1a827b76cc54e2fc1db999cc7ba82e7f9cd92c9e9d4
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample contains embedded JavaScript, which is a common technique for executing malicious code within PDFs. It also features numerous external URLs, many pointing to compromised WordPress sites, suggesting a link farm designed to redirect users. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or distributing further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://krisoc.ru/uplcv?utm_term=noun+phrase+pdf+download PDF link annotation
    • http://classtool.info/upload/files/jujelob.pdfIn PDF document text
    • http://mfplus.ba/wp-content/plugins/formcraft/file-upload/server/content/files/16070a44bbb4bd---33034042659.pdfIn PDF document text
    • http://superfasttv.com/uploads/files/11361244223.pdfIn PDF document text
    • https://takiminsahada.com/wp-content/plugins/super-forms/uploads/php/files/r4496pu4tjau0m1hthbt047sds/navekamuluderokefukixig.pdfIn PDF document text
    • https://chicagoportablexray.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ccea68a932---72739643933.pdfIn PDF document text
    • http://grupogmec.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099f6e46fcb4---wipuponewufuropiraruzi.pdfIn PDF document text
    • https://www.die-umzugsfabrik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160815cbc46148---fokawekunejikejiro.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609144fd451b5---napinire.pdfIn PDF document text
    • http://www.asslar.de/downloads/73750265020.pdfIn PDF document text
    • https://asaptransfers.co.uk/wp-content/plugins/super-forms/uploads/php/files/cea6572b7de8cb8065d5090cfe249ee0/birenusubed.pdfIn PDF document text
    • http://cuacuontoanthang.com/media/file/vosuzogeletavoxumate.pdfIn PDF document text
    • http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095d53cd0c29---86233472228.pdfIn PDF document text
    • https://www.colegiodomus.com.br/js/ckfinder/userfiles/files/53614746349.pdfIn PDF document text
    • http://www.brennholz-heinlein.de/wp-content/plugins/formcraft/file-upload/server/content/files/16094718518b14---mazevupilutedabovikun.pdfIn PDF document text
    • http://sunnysidehighschoolclassof59.com/clients/867562/File/mipupokelotodax.pdfIn PDF document text
    • https://copperscraphandlers.com/ckfinder/userfiles/files/sosarofudi.pdfIn PDF document text
    • https://bcm.es/files/galeria/files/novepafalejusixib.pdfIn PDF document text
    • https://zoorichi.com/temp/fckeditor/file/vedefisanu.pdfIn PDF document text
    • http://clubesquilacoma.com/uploads/files/5467441257.pdfIn PDF document text
    • https://halobysciton.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076e237cfc94---kapazevubikovefawetefumi.pdfIn PDF document text
    • https://directprocessors.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b1796e2b711---suvotowe.pdfIn PDF document text
    • http://zpb-maciejewski.pl/upload/fck/file/xodagobubexosafaxig.pdfIn PDF document text
    • http://srsheicha.com/uploadfile/file/faxekerafekufemipajifigo.pdfIn PDF document text
    • http://kioskcondoweb.wpengine.com/wp-content/plugins/formcraft/file-upload/server/content/files/160708238bb02f---kiwigexega.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_off0000e186.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE186 18716 bytes
SHA-256: 5c6811104359c4a1e9ec9bdade583f5629d537fe9890de0f1106902d11ba4941
font_01_sfnt_off000111ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111CA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000129e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129E1 10568 bytes
SHA-256: e8b3b7029ee9215c866f64f8a09814b428c5a45bb08e8c84ee10883aa9f5258f

Open this report in the interactive analyzer, or submit your own file for analysis.