Malicious PDF — malware analysis report

Static analysis result for SHA-256 b770656f4d606641…

MALICIOUS

PDF

119.4 KB Created: 2021-06-29 07:59:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 8a6fb9e583c24a51d30b0359f6ad5306 SHA-1: b129d849b115d77b642dd45347e0be3748914d8f SHA-256: b770656f4d606641bd9dfaffe8bd49b48fecc305bb82f58ae826379e126998d6
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is a common technique for delivering malicious content. Several heuristics indicate that the PDF acts as a link farm, pointing to compromised or disposable hosting domains, likely to host further malicious content or phishing pages. The ML classifier and ClamAV detection strongly suggest malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9632

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://www.quatainvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c4980136984---gozusikavusalogidabiwov.pdf In PDF document text
    • https://c4ir.ae/wp-content/plugins/super-forms/uploads/php/files/kstv5enuge445cmujhm1i88jf0/tunokepuzizamavod.pdfIn PDF document text
    • http://skup-laptopow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080105418021---93963120051.pdfIn PDF document text
    • https://joyfool.art/wp-content/plugins/super-forms/uploads/php/files/4ee47bc2278e76adfd17f96d4aea1c33/gizakurazepipafelafev.pdfIn PDF document text
    • https://levin-dent.ru/wp-content/plugins/super-forms/uploads/php/files/f8e3933de48126f7bebad22cbb5c4224/bodajivodadaboferak.pdfIn PDF document text
    • http://dzbnf.com/upload/file///54418698869.pdfIn PDF document text
    • https://leunamgroup.com/wp-content/plugins/super-forms/uploads/php/files/727d8c7695dcdd7c49cad027053c07e9/19002802765.pdfIn PDF document text
    • http://unipell.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16084242e44983---vaforukeba.pdfIn PDF document text
    • http://www.louthadventures.ie/wp-content/plugins/formcraft/file-upload/server/content/files/160727ff09affc---18136016489.pdfIn PDF document text
    • http://emotionpicturesfestival.gr/userfiles/file/baxotuporarerej.pdfIn PDF document text
    • https://encouragingmath.com/wp-content/plugins/super-forms/uploads/php/files/47a6b237093ca4aa72a8f17816d52348/37528689839.pdfIn PDF document text
    • https://www.lesson-online.org/wp-content/plugins/super-forms/uploads/php/files/jhkjjv61lpf1ujd5f10snl4jn0/jufuvugogisejezonipidom.pdfIn PDF document text
    • http://unityproductions.com/upload/files/suvipagusagelanow.pdfIn PDF document text
    • https://motelandratecuci.ro/userfiles/file/vofalubusobunapipumovatu.pdfIn PDF document text
    • http://stroisvias.ru/userfiles/file/vokis.pdfIn PDF document text
    • http://dspec-car.com/js/upload/files/ziwufekiz.pdfIn PDF document text
    • http://banghaija.com/userfiles/file/jumarofonide.pdfIn PDF document text
    • http://paramountswimwear.com/userfiles/files/94193222156.pdfIn PDF document text
    • https://ocvirapuato.com.mx/wp-content/plugins/super-forms/uploads/php/files/edf5cabf74d116dc773f1ccb07e48c2e/77128883521.pdfIn PDF document text
    • https://nuregio.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b7428c0618b---93619943853.pdfIn PDF document text
    • https://nuregio.de/wp-content/plugins/formcraft/file-upload/server/content/files/16099852609625---linakagefojezeb.pdfIn PDF document text
    • https://www.clubmanizales.com.co/wp-content/plugins/formcraft/file-upload/server/content/files/16083280eaec1c---77155343556.pdfIn PDF document text
    • http://firmykominkowe.pl/Obrazki/edytor/file/57830232671.pdfIn PDF document text
    • https://apparel.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/2af306bd81e254cb452047e4ef210c3a/61238033027.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=could+have+been+meaningPDF 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000130fb.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x130FB 23344 bytes
SHA-256: 98b6f7afef9ebfae8da06086893727133abc6e9013c11d7210722c21a1ed78fc
font_00_sfnt_off000118ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118EA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00015b43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15B43 29112 bytes
SHA-256: aaf5ddb352b6d8c99efb671bd603f9ee5c7f7982f6af400a286f35415b0538d8
font_03_sfnt_off00019e65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19E65 10668 bytes
SHA-256: a39cb09e2b0b40660127866d809d44cb46fa1f0a34e9b91bf09d7e20b00d71dd
font_04_sfnt_off0001b65a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B65A 7272 bytes
SHA-256: 71655395becb2c8254cb8faf2b3d221edfb536a93c6e7d1d621523339ab0d7b7

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