Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e6085619f45ea98…

MALICIOUS

PDF

86.8 KB Created: 2021-06-26 23:44:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: db5e5b222f82b68b42abf1cb1e6ff2e0 SHA-1: a9a84774ea047493d3c72a20eca19f2dced0339d SHA-256: 6e6085619f45ea98ff8bf7e29a5dc6a04eb918df08eb4e1442586f5eb1959392
156 Risk Score

Malware Insights

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

The PDF file contains numerous external URIs and is identified as a link farm, suggesting its purpose is to redirect users to potentially malicious websites. The ClamAV detection and ML classifier further support its malicious nature, classifying it as a phishing trojan. No scripts were extracted, but the extensive use of external links indicates a likely attempt to lure users to compromised sites for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://oniceh.ru/uplcv?utm_term=harry+potter+and+the+philosopher%27s+stone+film+download PDF link annotation
    • https://forex-robo.org/wp-content/plugins/super-forms/uploads/php/files/e725ee3dfbb828f645f04e81b1356763/54453724570.pdfIn PDF document text
    • https://mindspacepsytherapy.com/upload/ckfinder_temp/files/20210622232823.pdfIn PDF document text
    • https://www.parkgest.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160804d2e8d81d---buresakowoxowe.pdfIn PDF document text
    • https://mymango.ru/wp-content/plugins/super-forms/uploads/php/files/483346442e15e2daad3bcaca814db4aa/32211989480.pdfIn PDF document text
    • http://www.nbrownies.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608c49997d897---76779521635.pdfIn PDF document text
    • https://www.nestroots.com/wp-content/plugins/super-forms/uploads/php/files/96tcp1rk3h52002p8vrs091dt3/97019072082.pdfIn PDF document text
    • http://mesotects.com/wp-content/plugins/formcraft/file-upload/server/content/files/160982c32b5f60---87384970600.pdfIn PDF document text
    • https://thewentworthco.com/wp-content/plugins/super-forms/uploads/php/files/h2rnggkm52eoqmco2g9b37jmuj/12066325960.pdfIn PDF document text
    • https://svetpoznaniyaonline.ru/wp-content/plugins/super-forms/uploads/php/files/3353e1b692a7ff351df6460c9f6e7548/26473268303.pdfIn PDF document text
    • http://ohana1bbq.com/uploads/files/82167132134.pdfIn PDF document text
    • https://salubrismd.com/wp-content/plugins/super-forms/uploads/php/files/5b41fedbc02b36e8fd81a62d279d01a5/vudijibezunobununotiloko.pdfIn PDF document text
    • http://ottotech.center/userfiles/file/33971912964.pdfIn PDF document text
    • http://www.insurancedirectcanada.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160c8fe15e901a---somunexu.pdfIn PDF document text
    • http://raduzhniy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a69de5da898---raves.pdfIn PDF document text
    • http://maility.pl/_ADRESuserfiles/file/75877638557.pdfIn PDF document text
    • http://kapalishakti.com/ckfinder/userfiles/files/sopowipefetitoxekade.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cba6c540efb---satokifijarewelagu.pdfIn PDF document text
    • https://www.havanasalsa-dance-tours.com/wp-content/plugins/super-forms/uploads/php/files/f32224b399f13cd315bbeb0958b87daa/dokotezekejozerekuvub.pdfIn PDF document text
    • http://studiotecnicoprato.eu/userfiles/files/83014031825.pdfIn PDF document text
    • https://aneri12.eu/res/file/70064254740.pdfIn PDF document text
    • https://alakharia.com/public_html/userfiles/file/12210076168.pdfIn PDF document text
    • https://lightingsystemscol.com/wp-content/plugins/super-forms/uploads/php/files/07cebc6ed03050dd81e756bb9ddd23d0/88848041070.pdfIn PDF document text
    • http://sazjah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc6d1f5ea5a---sizavefakusi.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_off0000eda4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDA4 10988 bytes
SHA-256: fed866f9bfcd09688b64d0cbbb96022d216c50cc2ac4c026d140f77b7d70f365
font_01_sfnt_off00010706.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10706 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011f18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F18 17128 bytes
SHA-256: 1b8437a15adc7b3457e4a672bda0ed7fefb776cc99bd371bf930141665be6117

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