Malicious PDF — malware analysis report

Static analysis result for SHA-256 2305436b9ed5efc9…

MALICIOUS

PDF

73.4 KB Created: 2021-07-07 19:47:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 2de4718d6ab1d3ab206f41a2a13a932a SHA-1: 3e25fbaf97c9ab974704b73faed5346c786b1d7a SHA-256: 2305436b9ed5efc9826994232b0b044a2c93f9ceed289a805460aab4b77f94d9
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a ML classifier and ClamAV, indicating it is likely a phishing or malware distribution lure. The document contains a link farm pointing to numerous external URLs, many hosted on compromised CMS uploads or disposable domains, suggesting an attempt to obscure the final malicious destination. No scripts were extracted, but the presence of numerous external links strongly suggests the document's purpose is to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://ecohouse-lab.com/userfiles/file/62991940746.pdf In PDF document text
    • https://www.techsrollout.com/wp-content/plugins/formcraft/file-upload/server/content/files/160989dca52285---fotusamadepupuzinanudij.pdfIn PDF document text
    • http://acetuitioncentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16078f1f4e65be---10555222271.pdfIn PDF document text
    • https://sandzak.best/wp-content/plugins/super-forms/uploads/php/files/a6af81826e6a0601d3e8edc5380dc95f/felanitavugorudopodazi.pdfIn PDF document text
    • https://www.elitelawnsolutions.co.uk/wp-content/plugins/super-forms/uploads/php/files/473q6mg723hjuul2frra48877e/mepazevaro.pdfIn PDF document text
    • http://lasfyy.com/uploadfile/file/20210702131816681.pdfIn PDF document text
    • http://chunmianxian.com/upfolder/e/files/20210615224624.pdfIn PDF document text
    • http://phillipsbricksalumni.com/clients/56168/File/gofavosugogetubizasifoxi.pdfIn PDF document text
    • https://www.kadinlarsitesi.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606cae25e41e6---59170040631.pdfIn PDF document text
    • http://aucoindeshalles.fr/menu/file/10402556013.pdfIn PDF document text
    • http://xn--l3cbpp3gh4a5g5c.com/userfiles/files/gaviximimuzaweduduwopa.pdfIn PDF document text
    • https://auf.vn/wp-content/plugins/super-forms/uploads/php/files/559nqeoighvlbg7u8ei474v3l0/47937845040.pdfIn PDF document text
    • https://freedomtampons.com/wp-content/plugins/super-forms/uploads/php/files/080eeb5a3e4cd8f74b5527859ef7a0c0/74980664031.pdfIn PDF document text
    • http://allprintusa.com/admin/images/file/vedilos.pdfIn PDF document text
    • https://jdbailbonds.com/wp-content/plugins/super-forms/uploads/php/files/63bfaf830ce736e5ab52983830fa39c9/zadebete.pdfIn PDF document text
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a95f6636fc5---senupevuzevufunezep.pdfIn PDF document text
    • https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ce95a40f163---govefebusifatek.pdfIn PDF document text
    • http://xn--49s538bo8ux8c.net/userfiles/file/sinumukabavovutililov.pdfIn PDF document text
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/71c66edf0e0e4d14ee7ecb8eed01a363/komivoxagomi.pdfIn PDF document text
    • https://afd.me.uk/wp-content/plugins/super-forms/uploads/php/files/e2bfe3adpffrh4runarlh9evj1/gibuvipileletoti.pdfIn PDF document text
    • https://riondene.ch/img/uploads/file/notirabuxapi.pdfIn PDF document text
    • https://www.digitalsofts.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cb0f69d40a---bimuzupafuzaguwudu.pdfIn PDF document text
    • http://hotelamadeustorino.com/userfiles/files/41628626736.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=new+oxford+modern+english+book+3+teaching+guide+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_off0000bc24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC24 15708 bytes
SHA-256: ed6dacb481def5d82eeb9a75d8d366a52dd6589d8cf4efa21d20a21ba486eabb
font_01_sfnt_off0000e46a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE46A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fc81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC81 11736 bytes
SHA-256: cab47a51a6e80978d23fc092d2b733e6a1cfbe59a41685e24464716be3102982

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