Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbcad2f9ec68a71c…

MALICIOUS

PDF

81.3 KB Created: 2021-09-01 23:29:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 03fa7dc65da955b047a437f26e1a297e SHA-1: 67e1bc6a5965cd31783898d5f32bdadfc072e54b SHA-256: bbcad2f9ec68a71caaf41050860981d6cfedd1d4c074eb7fb81f6daafac855e0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document exhibits characteristics of a phishing lure, evidenced by multiple heuristics indicating it functions as a link farm hosted on compromised or disposable domains. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were extracted, the presence of numerous external URLs, many using UTM parameters, points towards an attempt to redirect users to malicious content, likely for credential harvesting or malware delivery.

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://chcial.ru/uplcv?utm_term=victoria+water+lily PDF link annotation
    • http://a-b-i-s.net/layout/bilder/file/gujejonativ.pdfIn PDF document text
    • https://neoville.ru/wp-content/plugins/super-forms/uploads/php/files/577c436913155b19d0a4001812251747/46511056138.pdfIn PDF document text
    • http://liveranigioielli.it/userfiles/files/dujuwi.pdfIn PDF document text
    • http://europeanprofservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a53c2605e9f---notirako.pdfIn PDF document text
    • http://mmdplus.com/userfiles/files/20210813_211117.pdfIn PDF document text
    • http://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/160fdf6d3ed51c---wanomabejigowexizuza.pdfIn PDF document text
    • https://fastcomputer.vn/wp-content/plugins/super-forms/uploads/php/files/133798aab92c800f3eb57406c2e3dc93/97480306546.pdfIn PDF document text
    • http://poiskvod.ru/images/file/bividoruzonofeti.pdfIn PDF document text
    • https://exihomes.com/userfiles/files/19664600728.pdfIn PDF document text
    • https://iamluno.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612fcb5daf46b---60906437389.pdfIn PDF document text
    • https://mm-podium.ro/userfiles/file/lomagepezunufojes.pdfIn PDF document text
    • https://majubesar.net/contents//files/sitinopaxapororaximi.pdfIn PDF document text
    • https://amesmedicalservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082b4b3b77a7---60042989574.pdfIn PDF document text
    • http://de-ko-gmbh.com/ckfinder/userfiles/files/zipalaruz.pdfIn PDF document text
    • http://pocatellocampfire.com/wp-content/plugins/super-forms/uploads/php/files/n1r6vitjl50arn1ciijk6lfvvj/walizudugelul.pdfIn PDF document text
    • http://ildongwire.com/userfiles/file/92673012777.pdfIn PDF document text
    • http://bivalyracing.hu/files/file/62876597301.pdfIn PDF document text
    • http://abapaposentados.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16078e7b1997c4---toruvoxapi.pdfIn PDF document text
    • http://luisacortesearchitetto.it/userfiles/files/33328826161.pdfIn PDF document text
    • https://nepalmicrofinancesummit.org/userfiles/files/96624657518.pdfIn PDF document text
    • https://postelezmasivu-liberec.cz/ckfinder/userfiles/files/pamegigaxovegemakodepuf.pdfIn PDF document text
    • https://realestateconnect.pro/wp-content/plugins/super-forms/uploads/php/files/ud29g9gneg50bc897re0akmlr7/fepogejavanepodamaxetabem.pdfIn PDF document text
    • http://qtjdb.com/UploadFile/2021/08/22/file/20210822_055147_141.pdfIn PDF document text
    • https://ipcare.nl/wp-content/plugins/super-forms/uploads/php/files/7csa16q9baitv0crcj2h6pqsup/34606105045.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_off0000dadc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDADC 10120 bytes
SHA-256: f184f41e4bce183b00dedbbff5840cd4ee18f9878864c336be3bcfff0aa1b782
font_01_sfnt_off0000f1a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1A9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000109bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109BB 17456 bytes
SHA-256: 0133d05b3b69b1acee1808e8584df48477d2779aaf3dcbc3ba902845ab252deb

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