Malicious PDF — malware analysis report

Static analysis result for SHA-256 b12e6000a85de6f3…

MALICIOUS

PDF

85.0 KB Created: 2021-08-18 16:23:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 632881f7e07734fcec698df32f22b2d6 SHA-1: d3d633a327d46da449ebd89a949a1dfea278222b SHA-256: b12e6000a85de6f395d9b0dd2ea6b57d8a4200394a7d5bac9d9a1cc70a9b3352
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, a common technique for executing malicious code within documents. This script likely redirects the user to external URLs, as indicated by the numerous PDF_URI and PDF_SEO_DISPOSABLE_LINK_FARM heuristics pointing to various domains. The ML classifier and ClamAV detection strongly support the malicious nature of this file, classifying it as a phishing or trojan variant.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://corianderedmonton.com/ckfinder/userfiles/files/42018381698.pdf In PDF document text
    • http://plnjl.com/userfiles/files/pijizupuberasoguvumis.pdfIn PDF document text
    • http://rajhansnursery.com/userfiles/file/24565786909.pdfIn PDF document text
    • http://ildungrice.com/fileupload/fckeditor/file/91820614418.pdfIn PDF document text
    • http://nakajima-ya.com/upload/save_image/files/wodasebojavixubajeligeguv.pdfIn PDF document text
    • http://svenstavik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c101a3ae908---giwuvobutotukemirokonak.pdfIn PDF document text
    • http://www.onekaddy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160717c93d588d---48868430990.pdfIn PDF document text
    • https://diversified-nj.com/wp-content/plugins/super-forms/uploads/php/files/aba8c6d6fcbab3bdba36144a1a6c62ff/kodazaxe.pdfIn PDF document text
    • http://www.iamgoingto1996.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a3ae3eb227---63485433330.pdfIn PDF document text
    • https://himalayanwanderer.com/himalayan/userfiles/files/67127958657.pdfIn PDF document text
    • http://serextion2006.com/js/upload/files/15910449438.pdfIn PDF document text
    • http://doks-films.com/pcms/content/file/tumusopu.pdfIn PDF document text
    • http://dilimkebab.com/userfiles/file/45565898833.pdfIn PDF document text
    • http://accomplishtheimpossible.com/userfiles_ati/file/93550875909.pdfIn PDF document text
    • https://nam.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608d18c29e178---sibaxu.pdfIn PDF document text
    • http://themultifold.com/wp-content/plugins/super-forms/uploads/php/files/fvmf0miqqtamsnv5s7eq2vim62/kofuseditapixejunob.pdfIn PDF document text
    • http://kristiankutschera.de/userfiles/file/50413128093.pdfIn PDF document text
    • http://kraljicabih.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1b91968215---wifidalifegazawutetulava.pdfIn PDF document text
    • https://qualitycountscleaning.com/wp-content/plugins/super-forms/uploads/php/files/471b5a6009649dcce50254cfa1443664/bazekedi.pdfIn PDF document text
    • https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c138b7e5251---14283177498.pdfIn PDF document text
    • http://dejede.com/userfiles/file/fowalonoju.pdfIn PDF document text
    • http://hpmcfamilyreunion1968.com/clients/83891/File/fepidawizokurulaj.pdfIn PDF document text
    • https://licorne-hotel-restaurant.com/userfiles/file/62661327173.pdfIn PDF document text
    • https://givemeit.ru/wp-content/plugins/super-forms/uploads/php/files/bc0c77094a7c7329fa946a0138095413/28999624417.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=how+to+ease+meralgia+parestheticaPDF 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_off0000e972.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE972 10792 bytes
SHA-256: 31e58d9f37266e6648db1564eba0906e7215d4587ea24563e02d2e5b0438122e
font_01_sfnt_off00010252.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10252 16976 bytes
SHA-256: 78cf336a93bbb0a25e20a86fc23811fe0cfaafc65d83928309cbd904924703e9
font_02_sfnt_off00012e5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E5C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1