Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd02e2a02bf573b8…

MALICIOUS

PDF

80.8 KB Created: 2021-09-13 14:46:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: feec1606013bd599ca7fcc88bb811435 SHA-1: cec465a65fe61c62b7f6c1acc84f595ea057bc34 SHA-256: cd02e2a02bf573b83f8f438f8a29ef69ef39674bc92a963a2f38372ac6ef2418
156 Risk Score

Malware Insights

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

The PDF contains a link farm directing users to multiple external URLs, with several hosted on compromised CMS uploads or disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery. The embedded URLs suggest a tactic of using link farms to obscure the final malicious destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://aglogistics-bo.net/userfiles/file/88776298099.pdf In PDF document text
    • https://ruxthai-guesthouse-chiangmai.com/ckfinder/userfiles/files/74294011851.pdfIn PDF document text
    • https://mttrasportisrl.it/dati/upload/file/25300795003.pdfIn PDF document text
    • https://bocion.com/ckfinder/userfiles/files/17288219387.pdfIn PDF document text
    • http://hcbarrett.com/user_area/file/nilutezajotejimajug.pdfIn PDF document text
    • http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/161360b3f82a0f---sitexolopivabisatu.pdfIn PDF document text
    • http://daimarconstrucciones.com/images/admin/file/10386320399.pdfIn PDF document text
    • http://kledingindex.nl/images/uploads/pedujizenamamabuvoxo.pdfIn PDF document text
    • http://mikailang.net/userfiles/file/20210903181253_751216881.pdfIn PDF document text
    • https://hopclickhospitality.com/scgtest/team-explore/uploads/files/9761099360.pdfIn PDF document text
    • http://fsf-vastroad.com/userfiles/file/28161533027.pdfIn PDF document text
    • http://nineslash.com/user_file/file/58663177485.pdfIn PDF document text
    • https://confetti-seasons.ru/upload/files/84795319264.pdfIn PDF document text
    • http://blfimmobiliare.com/userfiles/files/96460680215.pdfIn PDF document text
    • http://mycoapaisyl.com/webimages/files/24492520851.pdfIn PDF document text
    • http://k1a.ru/images/files/file/11405726074.pdfIn PDF document text
    • http://paymentsbusiness.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16132ca59b0a51---fuvakituxutojimawovude.pdfIn PDF document text
    • http://dangkykinhdoanhkiengiang.com/upload/ck/files/divagojupenuximokepu.pdfIn PDF document text
    • https://hr-serdahel.hu/images/file/1312418585.pdfIn PDF document text
    • https://misbahelmudii.org/ckfinder/userfiles/files/93974685998.pdfIn PDF document text
    • https://avenue102.com/uploads/file/52056210617.pdfIn PDF document text
    • http://www.ekoforte.com/upload/file/linapunipupepabis.pdfIn PDF document text
    • http://lor-rostov.su/userfiles/files/sulejapusuvunodajipaseket.pdfIn PDF document text
    • http://xn--9i1b14lwsg1seumdzsx.com/upload/fckeditor/file/vufoxejejenejuku.pdfIn PDF document text
    • https://tocgia247.com/wp-content/plugins/super-forms/uploads/php/files/iklraa8buub0so0htsikiha0r1/41490519846.pdfIn PDF document text
    • http://fuku-zou.com/userfiles/file/3355002264.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=shaandaar+full+movie+download+hd+720p+blurayPDF 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_off0000d0ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0AC 11368 bytes
SHA-256: 610c98cbe6543c20178db54e9bb712ac565a5e1677f3fe9569e1b2a9137bf973
font_01_sfnt_off0000eb22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB22 18464 bytes
SHA-256: 12e0ad5c1658daf2bbb509690c56ee01960f540d07e5713821f9965d7131746f
font_02_sfnt_off00011b46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B46 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1