Malicious PDF — malware analysis report

Static analysis result for SHA-256 0fe456d1d7a70d6e…

MALICIOUS

PDF

69.5 KB Created: 2021-09-02 13:20:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 1e083a407544fa5e7b06027fd5165727 SHA-1: f959f922258907273cdfea465658c391dfaa4b65 SHA-256: 0fe456d1d7a70d6e3969121e1626908afa371ab27477e0df07688ebb86b74e78
156 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier, indicating malicious intent. It functions as a link farm, with numerous embedded URLs pointing to various domains, many of which appear to be compromised CMS uploads. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' further suggests a pattern of using disposable hosting for link distribution, common in phishing and malware campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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://tbm-mova.by/images_from_html_editor/file/29024804172.pdf In PDF document text
    • http://themadthinker.com/temp/vinney/HTML/userfiles/file/nalirinisemipeke.pdfIn PDF document text
    • http://www.corazondelsol.es/ckfinder/userfiles/files/giwibufesisobagikisunem.pdfIn PDF document text
    • http://heibldr.hu/FCKfeltoltott/file/12479787440.pdfIn PDF document text
    • https://www.masismarketing.com/wp-content/plugins/super-forms/uploads/php/files/58d630bc60cfe9a4b543557bc2318429/84979646746.pdfIn PDF document text
    • https://korzayithalat.com/spot/admin/fckeditor/userfiles/file/pakesuzotagajafusuv.pdfIn PDF document text
    • http://discoveryenglish.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c96c538e41b---72496761550.pdfIn PDF document text
    • https://pilotcenter.gr/wp-content/plugins/super-forms/uploads/php/files/a2nat2jpii9fte29htj4shuk3g/vebud.pdfIn PDF document text
    • https://glosunspa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a02f08beefd---gexixavanarinifowaxaje.pdfIn PDF document text
    • https://peintures-descours.fr/fichier/files/rozekirowepu.pdfIn PDF document text
    • http://sushibelovo.ru/files/nuzedakerebetirenase.pdfIn PDF document text
    • https://hanmarklight.com/UploadFile/files/mojupuxelilalabajo.pdfIn PDF document text
    • https://yuktiedu.com/wp-content/plugins/super-forms/uploads/php/files/14957154c877c5bd0c35e5a34dfb9308/99305479877.pdfIn PDF document text
    • http://sushiloverca.com/uploads/files/meniwoz.pdfIn PDF document text
    • https://joyfool.art/wp-content/plugins/super-forms/uploads/php/files/e2f47dc5b0ff86dba7071cfacb29966a/lewevajaweri.pdfIn PDF document text
    • https://laetitiabernard.fr/images/file/nefixu.pdfIn PDF document text
    • http://artwatch.ru/userfiles/file/xekiju.pdfIn PDF document text
    • http://i-biohealth.com/files/pofuwenumamalonaxiso.pdfIn PDF document text
    • http://lawcab.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16081f8f1559f3---95873326081.pdfIn PDF document text
    • http://mytmbc.org/fckimage/file/lipopitopiber.pdfIn PDF document text
    • http://amexeuro.com/an3_Uploads/file/fubevegabifimajiden.pdfIn PDF document text
    • https://brawlcall.com/ckfinder/userfiles/files/jinimixesovewifujojoxi.pdfIn PDF document text
    • https://solener.info/ckfinder/userfiles/files/82881308349.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=odontogenesis+libro+pdfPDF 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_off0000afbc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAFBC 10676 bytes
SHA-256: d490e679635b0181d7686fbe069568b7bcf07ab9cbecc3f7741f3910c5189d32
font_01_sfnt_off0000c7dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7DC 15624 bytes
SHA-256: 91b22e5e8c1e1436d64147d3ea338862892ea04af041e28aa036600845faa537
font_02_sfnt_off0000eef3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEF3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1