Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e02808447ef4f7f…

MALICIOUS

PDF

73.4 KB Created: 2021-08-05 15:09:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 0a8f8b012b6e14a29f4f3138f21b48e0 SHA-1: cfdda5f158078b2b0797509f0a75841b03423759 SHA-256: 0e02808447ef4f7f7a776c3dfa1e3c0114c68c88c5c3b0ab41fe3ed633091cd6
156 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS platforms or appear to be part of a link farm designed to lure users. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or distributing further malware. The presence of multiple compromised upload links suggests an attempt to host malicious content or redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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 https://infrive.ru/uplcv?utm_term=fortnite+account+generators+that+actually+work PDF link annotation
    • http://ebsenglish.net/_UploadFile/Images/file/2463598818.pdfIn PDF document text
    • https://brigitte-farner.ch/userfiles/files/puripaxaxobu.pdfIn PDF document text
    • http://ttccid.com/userfiles/file/29107829832.pdfIn PDF document text
    • http://mitsubishilongbien.vn/images/ckeditor/files/45879707521.pdfIn PDF document text
    • https://g-ortho.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b28c72efd03---jojituratejanufavis.pdfIn PDF document text
    • https://broadstripe.com/wp-content/plugins/super-forms/uploads/php/files/a26ce1e36e5b94df1531989c380af500/dubanitazotisojijiweruzok.pdfIn PDF document text
    • http://coyada.com/up_images/up_images/rekipibugugati.pdfIn PDF document text
    • https://www.freshstartdigitalmarketing.com/wp-content/plugins/super-forms/uploads/php/files/9f991a1a7ac9bc2e0cc28853107b574a/30488627319.pdfIn PDF document text
    • http://www.egavilanes.com/ckfinder/userfiles/files/53001243581.pdfIn PDF document text
    • https://arhstroi.by/uploads/files/tobapazikalusofogup.pdfIn PDF document text
    • http://snp-ent.com/files/fckeditor/file/52003358061081121ae13a.pdfIn PDF document text
    • http://chretkinia.pl/userfiles/file/gozafugexewevibu.pdfIn PDF document text
    • https://topclassgreenery.nl/images/file/31338992479.pdfIn PDF document text
    • http://aire-limpio.com/img/editor/file/fonedeniwikazire.pdfIn PDF document text
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/n4jbs4cublm74beg6hs18cpsgu/jetejiwedaxegewasufunixor.pdfIn PDF document text
    • https://ehblending.com/wp-content/plugins/super-forms/uploads/php/files/10b239f2351c2eae0dc97751e1dae37b/8511861086.pdfIn PDF document text
    • http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607aabd6eab38---40416816434.pdfIn PDF document text
    • http://luckyassessoria.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160aa159d19a3f---kepedikimumemubenuvifujiv.pdfIn PDF document text
    • https://mandalaconfeccao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608185ca4a67c---387596271.pdfIn PDF document text
    • https://salubrismd.com/wp-content/plugins/super-forms/uploads/php/files/22002f55664c110c02c0ddb938aa5b9b/84593590865.pdfIn PDF document text
    • http://myshopgroup.com/userfiles/files/1474335569.pdfIn PDF document text
    • http://www.uppld.org/wp-content/plugins/formcraft/file-upload/server/content/files/160cb8767d2602---37839936314.pdfIn PDF document text
    • http://www.sg-callenberg.de/wp-content/plugins/formcraft/file-upload/server/content/files/16098597d00d42---39547919322.pdfIn PDF document text
    • 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_off0000bdfb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBDFB 10876 bytes
SHA-256: 609a8fe7878c7fa34246038f7f4c55587d64a5e87c6b1fd7c33a5411242d1075
font_01_sfnt_off0000d724.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD724 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ef36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF36 16040 bytes
SHA-256: 59d603348cebffc720e74087bd2ba58cc6d630d3b7a5d63c6bae9eb2a0a0f623