Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ed316d2220d5f30…

MALICIOUS

PDF

79.7 KB Created: 2021-09-07 06:52:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: ea5ad318fb95f21342357375a2459d73 SHA-1: bee942593e0c6d550650d8c2b32ccd6685569ad1 SHA-256: 0ed316d2220d5f30984c11eb35b37f2c031de4be3be9cb6084c02367dc879782
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links to external resources, many of which point to compromised CMS uploads or disposable hosting, indicating a link farm designed to redirect users to malicious content. ClamAV detection and ML classification strongly suggest malicious intent, likely phishing or malware distribution. The file's structure and URL patterns are consistent with a spearphishing attachment used to lure victims to compromised sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 https://connect.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/103daeefe047441507de38b0244293c1/zutefoxefinirudugat.pdf In PDF document text
    • http://www.johnknox.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16125fc0d60476---zufetidumamu.pdfIn PDF document text
    • http://ahcxdq.com/uploads/file/010950323324.pdfIn PDF document text
    • http://counterreaction.net/wp-content/plugins/formcraft/file-upload/server/content/files/160bb3100c757d---japejubina.pdfIn PDF document text
    • http://bielwod.com/userfiles/file/bibisinaneduduxodefiga.pdfIn PDF document text
    • https://privatecambodiatour.com/userfiles/file/kipekawapojawaj.pdfIn PDF document text
    • https://thokhoavietnam.com/upload/files/5391795768.pdfIn PDF document text
    • https://belloverde.net/emailer/file/52100121253.pdfIn PDF document text
    • http://anapharmata.hu/ckfinder/core/connector/php/files/bepom.pdfIn PDF document text
    • https://terlickodds.cz/www/www/fckphotos/file/vejefifeludixekolobaxiruf.pdfIn PDF document text
    • https://gpagroup.in/wp-content/plugins/formcraft/file-upload/server/content/files/160e2aac48dfc8---kotomowezonegu.pdfIn PDF document text
    • http://reikihaus.com/clients/75291/File/56618626962.pdfIn PDF document text
    • http://www.movingintofreedom.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c3746c5ba9---88641050258.pdfIn PDF document text
    • http://mp-hd.de/data/aktualnosci_imgs/file/66150983164.pdfIn PDF document text
    • https://makiriaszto.hu/ckfinder/userfiles/files/tovosir.pdfIn PDF document text
    • http://nhs71.com/clients/d/d9/d9c6bfbc4bbdd207836d30c01fe5869c/File/53884592403.pdfIn PDF document text
    • http://polkovnik.su/upload/file/darojogozita.pdfIn PDF document text
    • http://centralgiving.com/media/userfiles/file/58584845729.pdfIn PDF document text
    • http://asdgolfclubtoscana.com/writable/public/userfiles/file/10416028004.pdfIn PDF document text
    • https://f27szerviz.hu/upload/files/86448218949.pdfIn PDF document text
    • http://richwoods1969.com/clients/861079/File/34633624142.pdfIn PDF document text
    • http://decom.pro/admin/ckfinder/userfiles/files/timufadifuluxewawusedeter.pdfIn PDF document text
    • http://voijin.com/userfiles/files/xefakunekixonozufudojine.pdfIn PDF document text
    • https://viajespereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e5adbb2105b---17444927667.pdfIn PDF document text
    • http://93564497.com/userfiles/52667702919.pdfIn PDF document text
    • http://cadelupo.it/userfiles/files/foxumevoziwoxibi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=median+rhomboid+glossitis+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_off0000d0c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0C2 11076 bytes
SHA-256: d2222edd530ee8c6181d3e01262cef630c637f300d6381add7ed193c34c64215
font_01_sfnt_off0000e9e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9E2 18140 bytes
SHA-256: 5cdf36d5c1615753218d2068fa17367d7e9a8e8c8962208991c56eaaf47654c9
font_02_sfnt_off000118c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118C4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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