Malicious PDF — malware analysis report

Static analysis result for SHA-256 5230d164060c508a…

MALICIOUS

PDF

86.7 KB Created: 2021-08-05 02:53:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 9fcb015063b38b1f0fdbd756e72aac7d SHA-1: 846b93df143729f1001c461ab2bdbfba5f161798 SHA-256: 5230d164060c508a76715d6f9f95fdeed820d9f63d2a6268c00fb362f1180a98
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by a ML classifier and ClamAV, indicating a high likelihood of malicious intent. The document contains a large number of embedded URLs, many of which point to compromised WordPress upload directories or disposable hosting, suggesting a link farm or redirection scheme. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a phishing or malware distribution attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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 http://scissortailfarms.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2b341bf73d---22602942286.pdf In PDF document text
    • https://autotronics.vn/userfiles/file/kesapojesimufemazutaz.pdfIn PDF document text
    • http://kuhomania.ru/ckfinder/userfiles/files/jegalejukiledejewi.pdfIn PDF document text
    • http://www.contectrade.hu/fckfiles/file/20157715412.pdfIn PDF document text
    • http://redigonda.it/userfiles/files/80821973061.pdfIn PDF document text
    • https://saraelv.no/wp-content/plugins/formcraft/file-upload/server/content/files/1609efa394e17b---zimejakatixatuk.pdfIn PDF document text
    • http://tiszaikaland.hu/upload/file/wiforejadasarupek.pdfIn PDF document text
    • https://itchanoi.vn/uploads/news_file/kedezufefuvelakimi.pdfIn PDF document text
    • http://avtokapriz42.ru/userfiles/file/denujonifenaf.pdfIn PDF document text
    • https://thegioibaobicarton.com/Images_upload/files/12134439785.pdfIn PDF document text
    • http://dlt-nkp.com/fileupload//file/vonuzefosesaxuxixer.pdfIn PDF document text
    • http://sanarina-coaching.de/ckfinder/userfiles/files/tafozufo.pdfIn PDF document text
    • https://purefeeling8.com/data/file/vedopijagemug.pdfIn PDF document text
    • https://gangnampools.com/contents//files/xudewelunuwura.pdfIn PDF document text
    • https://ocvirapuato.com.mx/wp-content/plugins/super-forms/uploads/php/files/b49a414efa7f7aa58b0a803a35e84b2c/98094363375.pdfIn PDF document text
    • https://fatheragneliti.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc0abd98565---kopevadasagelejujabufewa.pdfIn PDF document text
    • https://ikima.fr/uploads/file/jukejediwajepubizexijew.pdfIn PDF document text
    • http://tgtech-auto.com/userfiles/file/jiwunavafapawo.pdfIn PDF document text
    • http://braintradingbcn.com/wp-content/plugins/super-forms/uploads/php/files/9b6ccb999ac801a9976f442c3792cc98/20092669107.pdfIn PDF document text
    • https://toskov-yordanov.com/userfiles/file/wezuselo.pdfIn PDF document text
    • https://thokhoavietnam.com/upload/files/39385639943.pdfIn PDF document text
    • https://expresstestingatl.com/wp-content/plugins/super-forms/uploads/php/files/ec1068bce6c95090764d9dc84ad03962/bamomadojane.pdfIn PDF document text
    • http://artmetinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3bd908bb0f---55047901372.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=dheeme+dheeme+song+dj+download+mp3+wapwonPDF 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

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_off0000ee65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE65 17052 bytes
SHA-256: c363bd6b8d33b78bd84888a7251b62a954a0261f23ce97e8296daf5a799cfb5e
font_01_sfnt_off00011b12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B12 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013329.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13329 10936 bytes
SHA-256: 1b42f60eff6c62e569896cbdfd07615de690555a8b957b140f513be936371a57

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