Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2dc7c9697970d3d…

MALICIOUS

PDF

84.8 KB Created: 2021-09-07 19:57:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 39fa2a588622223cab8794e7e502717b SHA-1: 68ba6a54649d8ef3e5360f3e9001e8c11757ded5 SHA-256: d2dc7c9697970d3d2afd861f5cbd00b1a72b3c5f13adea490e7a18abf701d75a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded URLs, many of which point to compromised CMS uploads or disposable hosting, indicating a link farm designed for phishing or malware distribution. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were directly extracted, the structure and URL patterns are consistent with a phishing lure, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://busankid.com/webfiles/board/file///rikolesu.pdf In PDF document text
    • http://meyras-tourisme.com/ressource/site-image/files/kowolawirajowurumisovomug.pdfIn PDF document text
    • http://domholidays.com/userfiles/file/gulozutadokugakukisug.pdfIn PDF document text
    • http://vksraja.in/fckeditor/upload/file/42494029788.pdfIn PDF document text
    • https://valve-toho.com/userfiles/file/94965137305.pdfIn PDF document text
    • http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610b5120af31b---zagasuro.pdfIn PDF document text
    • http://gwardiajuvenia.pl/zdjecia/fck/file/76058556587.pdfIn PDF document text
    • https://newshieldinsurance.com/demo/gsa/final/images/file/80928461763.pdfIn PDF document text
    • http://short-story.ru/upload/file/pagonirewebeka.pdfIn PDF document text
    • https://pavaniautismschools.com/wp-content/plugins/super-forms/uploads/php/files/50acgs91arpdrco7din7dtrtd9/24462834503.pdfIn PDF document text
    • https://theatresaucinema.fr/uploads/file/48877432480.pdfIn PDF document text
    • http://www.vivelamusica.es/wp-content/plugins/formcraft/file-upload/server/content/files/1607f1332b9d28---pesudojukanofutuje.pdfIn PDF document text
    • http://nacyc.jp/Upload/file/jugalafetuti.pdfIn PDF document text
    • https://marksiegeldds.com/wp-content/plugins/super-forms/uploads/php/files/aecbbc32bc814f521d7f839818887ef3/81057592451.pdfIn PDF document text
    • http://elvirajogsi.hu/ckfinder/userfiles/files/satosov.pdfIn PDF document text
    • https://bataretak.com/img/files/file/19552889670.pdfIn PDF document text
    • https://ehblending.com/wp-content/plugins/super-forms/uploads/php/files/5b8a6e01ae287c6051e153e328f2bcb5/73345822697.pdfIn PDF document text
    • https://eurouniversal.eu/ckfinder/userfiles/files/55083078439.pdfIn PDF document text
    • https://skyzoan.com/cake/beta/userfiles/file/82080185266.pdfIn PDF document text
    • http://stopasbestos.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607fdee958c34---pebofenurumapameg.pdfIn PDF document text
    • http://stellarvvv.ru/ckfinder/userfiles/files/lixibisodojiwoxu.pdfIn PDF document text
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/d40a5b2386fb189f6a23c083989ebe18/zatupexewobafip.pdfIn PDF document text
    • https://cnc-ar.ro/files/file/wivexajozuxavirekikupag.pdfIn PDF document text
    • http://nabisori.com/userfiles/file/suxum.pdfIn PDF document text
    • http://www.wm-meyer.de/meyer/admin/editor/ckfinder/userfiles/files/6392566478.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=first+aid+certificate+format+pdfPDF 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_off0000e7de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7DE 17296 bytes
SHA-256: f5da0490fa38fb486f4ca308e18bf70300bb832200a844007ec06e22ffc4e45c
font_01_sfnt_off00011500.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11500 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012d17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D17 10608 bytes
SHA-256: 3287721758094e4295059c510e91a994c0dd788c35d41fb7ef6684e71af05670

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