Malicious PDF — malware analysis report

Static analysis result for SHA-256 030303f36ca75b87…

MALICIOUS

PDF

128.7 KB Created: 2021-07-25 16:10:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: 3bb7d3d788c7da673fadc657edcf8e40 SHA-1: 23da91d13a3eedc4cb6e4acaeefbdb9518e07419 SHA-256: 030303f36ca75b87fc502009ca849e0690eead9f40f595495100411ddbf43b3c
156 Risk Score

Malware Insights

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

The PDF document contains numerous links, many of which point to compromised websites or disposable hosting, suggesting a phishing or redirection scheme. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the structure and URL analysis point to a link farm designed to lure users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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://gtlitalia.com/userfiles/files/78198745467.pdf In PDF document text
    • https://munord.com/wp-content/plugins/super-forms/uploads/php/files/bb8e6de543af30b7b205b506151279e2/37036998648.pdfIn PDF document text
    • http://makaifruits.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082ac3cd205a---17628598537.pdfIn PDF document text
    • http://agataklimowska.pl/userfiles/file/tulutama.pdfIn PDF document text
    • http://houselandia.ru/files/lilasimobuboxatat.pdfIn PDF document text
    • http://jarosi.hu/files/file/12810646428.pdfIn PDF document text
    • https://lensprovn.com/ckfinder/userfiles/files/vilureligad.pdfIn PDF document text
    • http://elmiraclassiccountry.com/wp-content/plugins/super-forms/uploads/php/files/clltvtna5hidgt43f6ofm88a17/7931936960.pdfIn PDF document text
    • http://cuacuongiare.vn/upload/files/29674136727.pdfIn PDF document text
    • http://shipsupply.ru/userfiles/files/xebuzovinarutolimose.pdfIn PDF document text
    • https://circolodelpistone.ch/userfiles/file/gupudebusopizunepo.pdfIn PDF document text
    • http://www.oknookna.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1607c58bf58f4b---72199413300.pdfIn PDF document text
    • http://sistersaviopublicschool.com/userfiles/file/56496746186.pdfIn PDF document text
    • https://pilot-nav.com/ckfinder/userfiles/files/91819137033.pdfIn PDF document text
    • http://constructionone.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608168ac3d9b8---ripewas.pdfIn PDF document text
    • https://biblioteka-koneck.pl/ckfinder/userfiles/files/kiselovazex.pdfIn PDF document text
    • https://readxyz.com/wp-content/plugins/super-forms/uploads/php/files/ddd0986370203b5e52397b2e383d3843/mewexivapavasalu.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/vvqffo8tvh3oum78blg5kp2g87/bodasuginapir.pdfIn PDF document text
    • https://diversified-nj.com/wp-content/plugins/super-forms/uploads/php/files/4e333f3b92454f7d8ca8e86533e62aa4/lamulovonodiwaj.pdfIn PDF document text
    • https://luminex.pl/upload/file/wunikit.pdfIn PDF document text
    • https://luxmarketing.agency/wp-content/plugins/super-forms/uploads/php/files/no69i4mvl6h9gup8p6f1f63jiu/23213229778.pdfIn PDF document text
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/160adb6d0c6229---15135517877.pdfIn PDF document text
    • http://xn--80aejmo0alc.xn--p1ai/ckfinder/userfiles/files/33400571173.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=edward+said+orientalism+short+summaryPDF 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_off00019395.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19395 10796 bytes
SHA-256: e03e3b226abc03b552270f9383ac755ed0fe058cc5377e61657be7cfc34f60d4
font_01_sfnt_off0001ac4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AC4D 18728 bytes
SHA-256: cee6cce70be9b9f5c6c585b5e7ffadbc07943f7acc2570494e283d89a3948b6a
font_02_sfnt_off0001db9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1DB9E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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