Malicious PDF — malware analysis report

Static analysis result for SHA-256 2fbbbac669a7e886…

MALICIOUS

PDF

87.7 KB Created: 2021-06-26 16:44:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 114c486680cb0171a6a82356509279d6 SHA-1: 23d93c62377289dbf46f51a942f0c353bb699429 SHA-256: 2fbbbac669a7e8864d174050caa6dfdf4da86a3875c8e8de160dcbd5bd8f69e0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a link farm pointing to numerous URLs, many hosted on compromised WordPress sites, suggesting an attempt to distribute phishing content or malware. The embedded links are likely intended to redirect users to malicious websites for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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://iwish-cosmetics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160750af325984---lizesabitibomobemapijojon.pdf In PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/hfbi7pm15ai3lvr0cf26ii53l1/61532169457.pdfIn PDF document text
    • https://khangle.vn/uploads/images/files/muzerome.pdfIn PDF document text
    • https://artlabjo.com/userfiles/file/84485921326.pdfIn PDF document text
    • https://cgeminfos.ma/upload/file/32232870596.pdfIn PDF document text
    • https://blindnow.com/userfiles/file/rofegopisip.pdfIn PDF document text
    • https://n95america.com/wp-content/plugins/super-forms/uploads/php/files/0d302d9c47842acb84050d3659a26d11/74167673499.pdfIn PDF document text
    • https://acethamessecurity.co.uk/wp-content/plugins/super-forms/uploads/php/files/392ac256aa8b7b60b0ceaf4b09e416b7/71805746357.pdfIn PDF document text
    • https://saftanton.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1608512e97e43b---sojasokajif.pdfIn PDF document text
    • http://www.saraviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ce4e78e5e41---bigaxoxowafe.pdfIn PDF document text
    • http://www.hkwebdesign.com.hk/wp-content/plugins/formcraft/file-upload/server/content/files/160a81e98a6007---voborejibuxun.pdfIn PDF document text
    • https://ntiverification.com/userfiles/file/tapozifibu.pdfIn PDF document text
    • http://luckyassessoria.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609f8ab71e13d---45551429520.pdfIn PDF document text
    • https://trimix.bg/UserFiles/File/tanogofemifefusedunire.pdfIn PDF document text
    • http://iamsoldierfit.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077f0ad95d83---89071433591.pdfIn PDF document text
    • http://brandweeramsterdamamstellanden.nl/userfiles/file/18835638177.pdfIn PDF document text
    • http://www.sg-callenberg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160bce292a9723---32555563262.pdfIn PDF document text
    • http://triatlonbizuterie.cz/sites/default/files/file/sobatetoparuwajutagel.pdfIn PDF document text
    • http://cesishotel.lv/res/wysiwyg/file/32324134540.pdfIn PDF document text
    • http://www.risingstars.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1608349c6266cc---tujoforematili.pdfIn PDF document text
    • http://fvv-hohenfelde.de/sites/default/files/files/zekokivolugilokeperapi.pdfIn PDF document text
    • http://vagtteam.dk/userfiles/Files/vukixewuxik.pdfIn PDF document text
    • https://www.rockandroll.blog.br/wp-content/plugins/super-forms/uploads/php/files/o47na7i8qo7vnsnr7jjdq8tod6/29939101429.pdfIn PDF document text
    • http://dragonera.cn/admin/userfiles/file/99650387975.pdfIn PDF document text
    • https://eclipsetheaters.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077968ea13e1---26161971220.pdfIn PDF document text
    • https://sunnyvale.com/wysiwygfiles/file/1523861741.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=movie+about+santa%27s+daughterPDF 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_off0000f1e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1E2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000109f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109F4 18048 bytes
SHA-256: d08e3be9de68635456d35c03e28876143f2cff7f77a1c8637383bacf7df32f47
font_02_sfnt_off0001386d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1386D 10816 bytes
SHA-256: 20675332168ca25faa0dcb3a2254a304e550aa501510024e996cc068dbfaf566

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