Malicious PDF — malware analysis report

Static analysis result for SHA-256 49bc73ad6b0284de…

MALICIOUS

PDF

75.2 KB Created: 2021-09-04 02:17:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 90d35c2d8d097e207d095fd40705fa22 SHA-1: 81bf03ac3fe5d93fde7fec2f6d1b9035cf7a9f07 SHA-256: 49bc73ad6b0284defc8a10c95cbf1645572a1bf67a1a558e3a3460e00e4bbd2f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous links, many of which point to compromised WordPress sites acting as hosting for further malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://thm-holding.ru/wp-content/plugins/super-forms/uploads/php/files/f08fdbce3b8c3a23193acf2c5412c8bb/pokaninofotidem.pdf In PDF document text
    • http://www.vitrierbxl.be/wp-content/plugins/formcraft/file-upload/server/content/files/1608ae9f4c606c---19230387252.pdfIn PDF document text
    • https://www.modianodesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b98a4d974d---69929373073.pdfIn PDF document text
    • http://chagatea.ru/wp-content/plugins/super-forms/uploads/php/files/b4e553184e871d0435657d5101f6d8ea/rofupegiz.pdfIn PDF document text
    • https://pestresolution.pt/site/upload/file/jazewemuxuliliri.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8d24765e90---63602889629.pdfIn PDF document text
    • http://maygiaphat.com/upload/files/38096105635.pdfIn PDF document text
    • http://watthaistuttgart.de/userfiles/file/22061630853.pdfIn PDF document text
    • http://luxe-pools.fr/i/File/35111411092.pdfIn PDF document text
    • http://arci-mp.fr/admin/File/xilegiribamapefekivoke.pdfIn PDF document text
    • http://cukiernia-waltar.pl/qcms/userfiles/file/suraxojojexomosanit.pdfIn PDF document text
    • http://www.grupohk.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607916027b740---wovurugewabipufinuketuk.pdfIn PDF document text
    • https://www.keystonecare.co.uk/wp-content/plugins/super-forms/uploads/php/files/6bac52fd47ab08685dfa5dc8621b4f34/bananowo.pdfIn PDF document text
    • https://cullinanconstruction.com/wp-content/plugins/super-forms/uploads/php/files/fv8g04aopa7tcsknbsmnj7fb4e/43915799144.pdfIn PDF document text
    • https://biodent.ro/m4fm_files/m4news/ck-uploads-files/34137970568.pdfIn PDF document text
    • http://www.nowsingapore.co.id/wp-content/plugins/formcraft/file-upload/server/content/files/16072d738c88dd---motoxusifedukelujoku.pdfIn PDF document text
    • http://geostudio.eu/userfiles/files/jizanoj.pdfIn PDF document text
    • http://toyotarent.hk/FileData/ckfinder/files/20210702_CBC76E7C377F5A3F.pdfIn PDF document text
    • https://cremeconferences.com/wp-content/plugins/super-forms/uploads/php/files/5aa343f2b684522680346f4436175afb/nanor.pdfIn PDF document text
    • http://jpmoto.biz/upload_picture/9981204723.pdfIn PDF document text
    • http://copingconversations.com/userfiles/file/kekigumojodudip.pdfIn PDF document text
    • https://triyoga-tv.ru/userfiles/file/37072246389.pdfIn PDF document text
    • http://evabody.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160d62220c571b---posewezugelijizirajumis.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=fisher+price+aquarium+take+along+swing+manualPDF 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_off0000c1be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC1BE 16748 bytes
SHA-256: 9664d8ae88c13348f84ae493f8ca4effdfe5eeb07b20af95c134077a6109c092
font_01_sfnt_off0000ecff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECFF 11220 bytes
SHA-256: 0a8c03d518185ddbe7ccbe6a906b960cca9eb7ebe189801068024c2abca46b6a
font_02_sfnt_off000106e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106E0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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