Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2af57a32826891d…

MALICIOUS

PDF

96.6 KB Created: 2021-07-09 10:04:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: dd025d0ac15403682e35aa055c1ab5a3 SHA-1: 765be3cc7a67076b6eb0b81f9af67dabe86f82b1 SHA-256: d2af57a32826891d58def53766dc930ca5addc87a63166199be901999dda71a6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of external links, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed for malicious redirection. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns are indicative of a malicious document, potentially leveraging embedded JavaScript for redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9929

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://bestforfishing.com/wp-content/plugins/super-forms/uploads/php/files/7bc2207e35b903ecd426628744325f5c/xavelomufumubepuk.pdf In PDF document text
    • http://areawifi.com/DESARROLLO/userfiles/files/90241377548.pdfIn PDF document text
    • https://www.simplythebestevents.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607c7b9328704---bexuxudex.pdfIn PDF document text
    • http://go-pxl.com/uploads/files/murugapawamiwejifa.pdfIn PDF document text
    • https://www.aironface.com/wp-content/plugins/super-forms/uploads/php/files/beba350dc07b3e0ad39ea9c0313f4262/musodaxud.pdfIn PDF document text
    • http://apexnepaltravel.com/userfiles/file/45087247609.pdfIn PDF document text
    • http://aimecostruzioni.it/userfiles/files/dejigalupetuxujokutupevi.pdfIn PDF document text
    • https://aduanaldelvalle.mx/userfiles/file/xafokokuselefe.pdfIn PDF document text
    • https://ocvirapuato.com.mx/wp-content/plugins/super-forms/uploads/php/files/74f9fed62060d775532194d1281c8179/8211324039.pdfIn PDF document text
    • http://primaria-ciocirlia.ro/media/file/lifavosipigojizazupe.pdfIn PDF document text
    • http://srihemkuntschoolint.com/slbdavbatala/userfiles/file/39001540194.pdfIn PDF document text
    • http://cka-shiba.com/ckfinder/userfiles/files/jafozizemifokepaj.pdfIn PDF document text
    • http://purpledoorchurch.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074d4f067a6f---88252562675.pdfIn PDF document text
    • http://www.lauricedale.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160c771144504b---82100335668.pdfIn PDF document text
    • http://firegallery.ru/img/upload/79671032459.pdfIn PDF document text
    • https://oversaslogistica.it/file/34198010904.pdfIn PDF document text
    • https://www.swx.global/wp-content/plugins/super-forms/uploads/php/files/dc39b05d2964e32835b18d3b60dbd80b/34072453714.pdfIn PDF document text
    • https://www.hauptsache.cc/wp-content/plugins/formcraft/file-upload/server/content/files/160aa4b4c7690e---bajad.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1606c8a9f09624---72698184025.pdfIn PDF document text
    • https://www.davinci.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160984cdd8cdfc---69172301025.pdfIn PDF document text
    • https://fwullong.com/upfiles/editor/files/forosikonaderuk.pdfIn PDF document text
    • https://locktactyuma.com/ckfinder/userfiles/files/91487108220.pdfIn PDF document text
    • http://www.sensible-seeds-premium.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a054482b205---potokisiragelofipuwoz.pdfIn PDF document text
    • https://www.modianodesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f9d7f3c6e8---lejotegugevom.pdfIn PDF document text
    • http://chromavials.com/d/files/jusezokis.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=percolation+water+cyclePDF 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_off00011755.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11755 10256 bytes
SHA-256: f62ba36a147a7a7d2860a0b7b59139b3d5babb6c830518dbbed322b48a137481
font_01_sfnt_off00012e8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E8E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000146a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x146A0 17848 bytes
SHA-256: c440996bc3b36aa12fabafa8232722165668f4260bbaf91ad589676854af6375