Malicious PDF — malware analysis report

Static analysis result for SHA-256 e00bde8c372d9e08…

MALICIOUS

PDF

71.0 KB Created: 2021-09-26 00:53:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 507b36d188e1fe3e46499026631f799d SHA-1: bc5bf7021ccafa3f020226a940e9da089de307e7 SHA-256: e00bde8c372d9e08e7ee2f0631ed07c405f5befdf93d9efe183f07c2288c8da1
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF file flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier with high confidence. It contains embedded JavaScript, which is a common technique for executing malicious code within PDFs. The document also features a link farm pointing to compromised CMS upload storage and disposable hosting, suggesting an attempt to distribute further malicious content or redirect users to phishing pages. The presence of embedded JavaScript and the nature of the URLs indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://www.lorenzofranzone.it/wp-content/plugins/super-forms/uploads/php/files/f1a706d310587eda12b3337ac77e9351/kuzobolidasazeb.pdf In PDF document text
    • http://andreuma.madteam.net/ckfinder/userfiles/files/7046404904.pdfIn PDF document text
    • http://www.alwaysflorida.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614f94b03a752---jagonajefukifodadalezaka.pdfIn PDF document text
    • http://clinicaveterinariabilancino.it/userfiles/files/81796634174.pdfIn PDF document text
    • https://ceadersvalet.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614f91f888d0f---80542662625.pdfIn PDF document text
    • https://wilsonbarrera.com/inicio/wp-content/plugins/formcraft/file-upload/server/content/files/1614b5735bae5b---dabezesakujurilof.pdfIn PDF document text
    • http://traiteur-ribot.fr/userfiles/file/tukezejirujipulufi.pdfIn PDF document text
    • http://cn-biyoute.com/d/files/20109679811.pdfIn PDF document text
    • http://podwierzba.eu/ckfinder/userfiles/files/ravaw.pdfIn PDF document text
    • http://gintaras.cz/userfiles/file/1133985243.pdfIn PDF document text
    • https://invision.buzyhub.com/files/46415894800.pdfIn PDF document text
    • http://www.immiflex.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139dd7da8337---70124182929.pdfIn PDF document text
    • http://mcutech.net/upload/2021/09/file/1631119833693848996.pdfIn PDF document text
    • https://gionggiacam.com/ckfinder/userfiles/files/44410470264.pdfIn PDF document text
    • https://globalcircle.club/userfiles/file/woxomebenelakotisi.pdfIn PDF document text
    • http://actionelectric.pt/www/wp-content/plugins/formcraft/file-upload/server/content/files/161488a7049100---jiduxeruli.pdfIn PDF document text
    • https://kakvkusno26.ru/wp-content/plugins/super-forms/uploads/php/files/015faec2b0485e1c26c5bf3b2de5be1a/56793107088.pdfIn PDF document text
    • http://zs-oilfieldequip.ru/d/files/3967772027.pdfIn PDF document text
    • https://bestmiamiturf.com/wp-content/plugins/super-forms/uploads/php/files/0236415ff14f2f5b96215e70e6abe780/zadiwenote.pdfIn PDF document text
    • https://www.rockandroll.blog.br/wp-content/plugins/super-forms/uploads/php/files/h32qjqplpg1bsps4iqgcfdlm6s/bizumebis.pdfIn PDF document text
    • https://bibliotheque-des-arts.ch/ckfinder/userfiles/files/57355329845.pdfIn PDF document text
    • https://allcondosales.rodeodrivecondosale.com/userfiles/files/41839860201.pdfIn PDF document text
    • https://samsungklima.net/upload/ckfinder/files/kenazuvogetatid.pdfIn PDF document text
    • http://volvo-cars.jp/js/upload/files/19139474212.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=minecraft+apk+homePDF 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_off0000b49c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB49C 16548 bytes
SHA-256: f1b443bf9a94675e477cb39a98c0ea15c2b561452347bd6dc9a896bd75677d78
font_01_sfnt_off0000de32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE32 10616 bytes
SHA-256: 88f1ff1a3f4fce617160657947495f0d1294ad65c5927dabbe8c831a898de30a
font_02_sfnt_off0000f647.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF647 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1