Malicious PDF — malware analysis report

Static analysis result for SHA-256 330448024eceb0fe…

MALICIOUS

PDF

86.8 KB Created: 2021-07-09 00:26:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: b780bed2003dd19aba1790ce6c1ac0ff SHA-1: 216bc4065217833b586d2b93b4c0e92b51988329 SHA-256: 330448024eceb0fe0f8afc0330d64b8ec2583eb8b1c9ae6a82a3b5af00c6596f
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to compromised WordPress sites hosting further PDF files, indicating a link farm or SEO manipulation tactic. ClamAV detected this as Pdf.Phishing.Trojan, and ML classifiers also flagged it as malicious. The presence of multiple distinct hosts and the nature of the embedded URLs suggest an attempt to distribute malicious content or engage in phishing, likely delivered via spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://thepetrichortouch.com/wp-content/plugins/super-forms/uploads/php/files/vfofk6rhqkm115rb300kn8g9r2/58564349635.pdf In PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/0pfm6vb13i6q5o5ckmvne9s916/32958528074.pdfIn PDF document text
    • https://gancza-yacht.pl/userfiles/file/lavibokawebevexatopaka.pdfIn PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/f0e8773892e414043dfae6f23f1a69dc/45754795771.pdfIn PDF document text
    • http://drvision.org/wp-content/plugins/formcraft/file-upload/server/content/files/160da3efb90817---mexoriwowikiwevojisomer.pdfIn PDF document text
    • http://bakoca.hu/files/file/20382056209.pdfIn PDF document text
    • http://vintageguitar.ru/ckfinder/userfiles/files/dobirasigisuletuzapexuv.pdfIn PDF document text
    • https://daleplumbinginc.com/wp-content/plugins/super-forms/uploads/php/files/fdaf4b38cdc93d0b94fe64633a6feebd/lonam.pdfIn PDF document text
    • http://www.louthadventures.ie/wp-content/plugins/formcraft/file-upload/server/content/files/160a2d1ca86c56---21448444876.pdfIn PDF document text
    • http://ipjanah.ir/wp-content/plugins/super-forms/uploads/php/files/2lr378kk4dlethtqairf2hoat0/dokag.pdfIn PDF document text
    • https://yingzhaoliuart.com/upload/file/mazixurunixudixire.pdfIn PDF document text
    • http://www.webtony.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160752a39db8d8---lozotuluvujiwa.pdfIn PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/38c0d134c83cbe2f084e1b5fd2b91562/95288479044.pdfIn PDF document text
    • https://newat.ru/wp-content/plugins/super-forms/uploads/php/files/8b294728859007b0184a7f8605b06c6e/turotemuvovosizipanosuxa.pdfIn PDF document text
    • https://latework.cz/soubory/32505091865.pdfIn PDF document text
    • https://www.plsok.com/wp-content/plugins/super-forms/uploads/php/files/04d80836858c6f54d2ff0f1e8180d635/takegogifaxuwuvatexemuwa.pdfIn PDF document text
    • http://terapie-psi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a610683b948---zuremudafanuwoje.pdfIn PDF document text
    • https://www.harasportcenter.com/wp-content/plugins/super-forms/uploads/php/files/udp16ar4n72hl2u4jg68bhv3up/49766389785.pdfIn PDF document text
    • https://www.andyselfstorage.co.uk/wp-content/plugins/super-forms/uploads/php/files/hfg41d1tvohvondaujail3deto/xugalu.pdfIn PDF document text
    • https://bentzendesign.se/wp-content/plugins/formcraft/file-upload/server/content/files/160b46a25c9740---14573313563.pdfIn PDF document text
    • https://webtraffic.ch/wp-content/plugins/super-forms/uploads/php/files/14klb2p44r9n068qc4j6i5r5a3/nobogevubajuzutazujega.pdfIn PDF document text
    • https://www.paparazzirestaurant.com.au/wp-content/plugins/super-forms/uploads/php/files/913d343121c11848764a30ba421512d4/linexotujebupujilisomav.pdfIn PDF document text
    • http://aurora-c.jp/files/files/84362392687.pdfIn PDF document text
    • http://balone.net/_upload/file///89040073075.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=importance+of+value+educationPDF 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_off0000f16a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF16A 10732 bytes
SHA-256: e8da9e07647928e52fd6ae7aa519c980511992a0ac7c0d08f272ab0aab66b031
font_01_sfnt_off00010a00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A00 16980 bytes
SHA-256: cb7ac08f91c2461a27c0c5489fdad575dd6614acf3e89921975effbc474875ed
font_02_sfnt_off00013621.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13621 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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