Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7c514c21979d97e…

MALICIOUS

PDF

69.3 KB Created: 2021-09-24 19:25:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 5f992a767b51e90f76cab2f85e2d044e SHA-1: 8e267979c8ae33199558e104fa528cc56b999c0f SHA-256: d7c514c21979d97ebf3cb9237f9043fce2b056a28d566ad33f7b5bc0cd2c3940
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs that point to various domains, many of which are associated with compromised CMS uploads or disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware delivery via these external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://pixomot.ru/uplcv?utm_term=pokemon+emerald+hack+download PDF link annotation
    • http://venusland.vn/app/webroot/img/files/todosoxajuvutiz.pdfIn PDF document text
    • https://betenenergy.com/sites/default/files/file/jiwaji.pdfIn PDF document text
    • https://simovi.mx/wp-content/plugins/formcraft/file-upload/server/content/files/16138cf2dd75fa---55625426484.pdfIn PDF document text
    • http://vuoncotichdep.com/upload/files/lelekanejikakuviropugira.pdfIn PDF document text
    • https://stakeoutllc.com/wp-content/plugins/super-forms/uploads/php/files/8d5dc8d69daa73690e9b89c2f66c0c02/romezaxinowomafeguvo.pdfIn PDF document text
    • https://olterus.info/contents/files/vedino.pdfIn PDF document text
    • https://arab-hams.com/Ups/files/mizapepileradivofaxamipi.pdfIn PDF document text
    • http://csc028.com/userfiles/file/20210924011833_krdgcc.pdfIn PDF document text
    • http://autosoftware.company/autoresponders_images/files/rapunupomupuxipomokuz.pdfIn PDF document text
    • http://nicolalazzarotto.com/userfiles/files/xogolajefiganowek.pdfIn PDF document text
    • http://polkovnik.su/upload/file/79908093937.pdfIn PDF document text
    • http://fundacjahfg.pl/upload/file/15369489041.pdfIn PDF document text
    • http://duancanhotot.com/upload/files/51688325408.pdfIn PDF document text
    • http://losmarinoslanzarote.com/marinarubicon/admin/file/44993049722.pdfIn PDF document text
    • http://bsbcarpet.com/userfiles/file/mitunalunebedopatijikaxo.pdfIn PDF document text
    • http://bizwd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c47aec08e2---nixuwijelurototilalok.pdfIn PDF document text
    • https://dveropolis.ru/upload_picture/98940757007.pdfIn PDF document text
    • http://apothepharma.com/upload/files/fefatoji.pdfIn PDF document text
    • http://studiodispirito.it/userfiles/file/64487339060.pdfIn PDF document text
    • http://joyearland.com/ckfinder/userfiles/files/vudojirapexubagemopelusip.pdfIn PDF document text
    • https://nuregio.de/wp-content/plugins/formcraft/file-upload/server/content/files/1614b1a03c3002---48485906832.pdfIn PDF document text
    • http://kazenergy.kz/wp-content/plugins/formcraft/file-upload/server/content/files/1613f915e8a2bf---99707086591.pdfIn PDF document text
    • https://2acontractor.it/images/file/lorinugapik.pdfIn PDF document text
    • https://softwebstar.com/shop/userfiles/file/muwunamu.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_off0000b16d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB16D 10456 bytes
SHA-256: bb17175c2c0aedf41732fc964a02f9afa13a2b0cfe23810000bf5c856350ab92
font_01_sfnt_off0000c8fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8FB 15372 bytes
SHA-256: 18d7d9fcfbcb57cfde6ef6b197d5d31cf29f867f963c7e9cef8ef015ba7064a9
font_02_sfnt_off0000effb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFFB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1