Malicious PDF — malware analysis report

Static analysis result for SHA-256 89fb481f5d3024d7…

MALICIOUS

PDF

102.5 KB Created: 2021-08-20 23:08:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-01
MD5: ed7d68aabff5a78f47cde195bb0ce3dc SHA-1: cdbc906f6cb6213f4cb37c3c6b917b1eadbbc795 SHA-256: 89fb481f5d3024d7aaef24b4993f8112c530ac4a2edd955ec47a7a49262cd817
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses a password-protected-archive lure. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://cukiernia.eu/upload/files/bilowasifatunisoboboj.pdf In PDF document text
    • http://www.miamiairportlimo.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607111a1c1606---3577682288.pdfIn PDF document text
    • https://diphong.com/uploads/98906678146.pdfIn PDF document text
    • http://birons.net/wp-content/plugins/super-forms/uploads/php/files/7fa5804cf19addea64906419ce8f5a90/82433897757.pdfIn PDF document text
    • http://matchonusa.com/uploads/files/worulokogiwasosobawiw.pdfIn PDF document text
    • https://bbpartner.cz/userfiles/file/41898268777.pdfIn PDF document text
    • https://sdyh.gr/wp-content/plugins/super-forms/uploads/php/files/i0scvqoldbsuspsq9dl4leh7g5/tidelakidetopotiwaliw.pdfIn PDF document text
    • https://heatingboiler.ca/fck_upload/file/36680909366.pdfIn PDF document text
    • http://tiendanatacion.com/noticias/files/jifod.pdfIn PDF document text
    • http://caycanhtuyhien.com/uploads/image/files/jedoxevojuboturanifof.pdfIn PDF document text
    • https://cplastik.cz/data/cms/file/7376763100.pdfIn PDF document text
    • http://artkulinaria.pl/sites/default/files/file/nizanikobipozesi.pdfIn PDF document text
    • http://xn--or3bi2da319p.com/upload/fckeditor/file/18318087943.pdfIn PDF document text
    • http://www.primalegal.eu/wp-content/plugins/super-forms/uploads/php/files/t69i0r77jfok4k07q8pg0ckqh2/63634454532.pdfIn PDF document text
    • https://telenovella-bg.com/files/sidalopiwujutakifuw.pdfIn PDF document text
    • http://floral-design-lindgens.de/userfiles/file/69107552625.pdfIn PDF document text
    • http://discoveryenglish.org/wp-content/plugins/formcraft/file-upload/server/content/files/16086c99d46357---wiwiwamobomegerebamur.pdfIn PDF document text
    • http://cl-pub.com/files/files/fupam.pdfIn PDF document text
    • http://ristoranteibucanieri.it/userfiles/files/42655030875.pdfIn PDF document text
    • http://consol.hu/images/uploadedimages/file/94519568062.pdfIn PDF document text
    • https://globalclassic.org/wp-content/plugins/super-forms/uploads/php/files/2p5vkvie2coukg7e2r9nvluvmr/vekogebozogiza.pdfIn PDF document text
    • http://articolo17.it/siti//usr/foto/files/13385388068.pdfIn PDF document text
    • https://www.dolphinrfid.com/wp-content/plugins/formcraft/file-upload/server/content/files/160726312edce4---83054905076.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=iron+man+ppsspp+game+download+highly+compressedPDF 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_off0001295a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1295A 17992 bytes
SHA-256: aeb7020feac808484ffeb06aacadae2c4de243e4ccd001bd1c1c2052ddd4d58d
font_01_sfnt_off000158b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x158B2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000170c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x170C9 11012 bytes
SHA-256: 80ce7d66653adfb224a09e20358eb68f3486e4637e4afddc19e6f477ad733b12

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