Malicious PDF — malware analysis report

Static analysis result for SHA-256 800d699503beef5c…

MALICIOUS

PDF

76.4 KB Created: 2021-09-07 15:34:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 85f5bb9c2d6222468339bf45b7b5640c SHA-1: b8c8b3ba6bcdf0eaa0976ec99510c105015672d6 SHA-256: 800d699503beef5cbd49a55dc9df5593288efb867fb3f403127241e3a220ebc4
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded JavaScript and numerous links pointing to compromised websites and disposable hosting, indicating a phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly suggest malicious intent, likely to redirect users to malicious content or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9943

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.santaterezinha.com.br/js/ckfinder/userfiles/files/paxafumelexozera.pdf In PDF document text
    • https://postscriptproductions.com/wp-content/plugins/formcraft/file-upload/server/content/files/16126ecbfc2bd5---88753471795.pdfIn PDF document text
    • https://abril.pe/wp-content/plugins/super-forms/uploads/php/files/0ii265d6j7cqt0l6ammqiusg10/safalulololowone.pdfIn PDF document text
    • https://camelcarpet.org/d/files/18044361262.pdfIn PDF document text
    • http://yaqeen-eg.com/userfiles/file/23270881769.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160743a81da8d5.pdfIn PDF document text
    • https://www.oasipizza.it/wp-content/plugins/formcraft/file-upload/server/content/files/1612716f648670---37448765145.pdfIn PDF document text
    • https://evermoral.hk/upload/file/1630230787.pdfIn PDF document text
    • http://zamel2.pl/userfiles/file/83090712257.pdfIn PDF document text
    • https://volnynaklad.cz/data/file/gulepuzomuwumixo.pdfIn PDF document text
    • http://kleinschaden.expert/userfiles/file/65670759411.pdfIn PDF document text
    • https://purevdavaa.mn/uploads/ckfinder/files/86854393109.pdfIn PDF document text
    • http://www.radio-kum.si/data/files/petamol.pdfIn PDF document text
    • http://bapassamarinda.id/assets/ckfinder/core/connector/php/uploads/files/34107696538.pdfIn PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/4s68792u0ab1333aelr54ps0t4/nesiti.pdfIn PDF document text
    • http://www.peritaonline.es/ckfinder/userfiles/files/96805661650.pdfIn PDF document text
    • https://microfocus-realize2020mea.com/wp-content/plugins/super-forms/uploads/php/files/039e4fb41f69e7acd36cfd6e288d8d78/bulowitepudojokus.pdfIn PDF document text
    • https://mymovingestimate.com/wp-content/plugins/super-forms/uploads/php/files/7cad842cd7c32215bde84a994cb1c080/jiduwedoduselupariju.pdfIn PDF document text
    • https://cremeconferences.com/wp-content/plugins/super-forms/uploads/php/files/73ae75e52c4410a07a562b30d0571960/makurajavaxip.pdfIn PDF document text
    • http://drivingschool-brno.eu/files/9162922960.pdfIn PDF document text
    • https://agermag.ro/mm/file/vabekile.pdfIn PDF document text
    • http://talani.nl/userfiles/image/file/18579842359.pdfIn PDF document text
    • http://thietbikhachsanvinhhung1.com/upload/files/57607880994.pdfIn PDF document text
    • http://hndgyl.com/v15/Upload/file/202173713511100.pdfIn PDF document text
    • http://woonhuislift.info/wp-content/plugins/formcraft/file-upload/server/content/files/16071984583806---sarevunap.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=export+html+table+to+pdf+using+jquery+jsfiddlePDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bae4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBAE4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d2fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2FB 11660 bytes
SHA-256: 9196dd69ebbcd1b89056b524e39cd766517729577c4a8d003e3c03e869f763e3
font_02_sfnt_off0000edc2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDC2 20544 bytes
SHA-256: 8181f6de1a0e25fd2e24fdcaa0a694690c6fe5ea314fba9b1c4aded770b37940

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