Malicious PDF — malware analysis report

Static analysis result for SHA-256 47c52010656c3b76…

MALICIOUS

PDF

86.3 KB Created: 2021-08-09 09:04:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-27
MD5: 4354310afbf7e277152bd061916589df SHA-1: 3c0e30621fc9768dc040e697b4cc3ca935aa0c69 SHA-256: 47c52010656c3b767bfe6db9fd727d8fffe8a8848782fd6f178b4ccaf435a3bb
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution attempt. It functions as a link farm, containing numerous URLs that point to external websites, many hosted on compromised CMS platforms. The presence of external URIs and the overall structure suggest the document is designed to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://coretry.ru/uplcv?utm_term=palabras+de+sentido+pesame+cristiano PDF link annotation
    • http://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073205956d13---niwomu.pdfIn PDF document text
    • http://urbanconstructions.org/images/uploadedimages/file/72536489099.pdfIn PDF document text
    • https://newtech-utm.pl/userfiles/file/9388612861.pdfIn PDF document text
    • https://riverasphotovideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081dbcda411b---lomavonufarifekobupade.pdfIn PDF document text
    • https://www.traveltimevipp.com/wp-content/plugins/super-forms/uploads/php/files/c6c31996cc8971897bc60a634a1a29f9/26131941587.pdfIn PDF document text
    • https://popcouncilinstitute.org/wp-content/plugins/super-forms/uploads/php/files/0158f91c54e712d272c10ea201f394f4/26542757799.pdfIn PDF document text
    • https://mariellatriolo.it/public/file/44172825031.pdfIn PDF document text
    • http://www.barankayalar.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160769355ec2b7---40031057723.pdfIn PDF document text
    • http://bjaimama.com/data/upload/2021/07/file/202107192015219399.pdfIn PDF document text
    • https://infravoip.com/wp-content/plugins/super-forms/uploads/php/files/588dc49fe4a5ab0b5f50722716cb5985/xuzalababowemag.pdfIn PDF document text
    • https://santechnikosdarbai.lt/images/files/rutugofobupuwixifo.pdfIn PDF document text
    • http://parfumerieindex.nl/images/uploads/86553986178.pdfIn PDF document text
    • https://www.taxikladis.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160721db26fa9d---junuv.pdfIn PDF document text
    • http://abcbyspu.net/ckfinder/images_store/files/mijirujirelefu.pdfIn PDF document text
    • http://appinaris.net/ckfinder/userfiles/publics/files/zaseranizenama.pdfIn PDF document text
    • https://www.swx.global/wp-content/plugins/super-forms/uploads/php/files/4f70eda31485461e5c3321b24dc2fc16/sexasetiduvafojexuzu.pdfIn PDF document text
    • http://slanfusa.org/clients/47225/File/jefoziv.pdfIn PDF document text
    • https://lllk.ru/wp-content/plugins/super-forms/uploads/php/files/419b085d257c2469db6ce58363965ec5/70775232692.pdfIn PDF document text
    • http://linkipt.com/_UploadEditor/files/jukefokizusizunukidipejup.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160b88862cf7fe---nedaxolonazimanesawomab.pdfIn PDF document text
    • https://victorybear-info.com/userfiles/files/25855298927.pdfIn PDF document text
    • http://hiddenforrest.net/clients/76790/File/fedulolir.pdfIn PDF document text
    • https://prikolnaya.com/wp-content/plugins/super-forms/uploads/php/files/fe7b207a78000f4a8ebd43ef7b6e9717/zugodejajekob.pdfIn PDF document text
    • https://chambredhotes-savoie.com/ckfinder/userfiles/files/33856173179.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_off0000ea3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA3E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010250.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10250 18464 bytes
SHA-256: e0914f68b7789fc04c894630da077bc8ff70e4107b11bcca23ad60285b1f065a
font_02_sfnt_off000130dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130DD 10816 bytes
SHA-256: 3f83c885e706da48e780a3a6a4b2b6fa8dc5d5c9b6b566725789d466cfdb5673

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