Malicious PDF — malware analysis report

Static analysis result for SHA-256 0dce5091cc8f0d6b…

MALICIOUS

PDF

80.3 KB Created: 2021-09-04 01:51:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: f0eb039040c734d85b4fafb8b862bb25 SHA-1: a524387c61a8f5fb7b872b4ef9c72661dbdd8966 SHA-256: 0dce5091cc8f0d6bc6495fbc3b06b7cbe796ae06a36944f8c8a1fdcad24bfec4
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and multiple external URIs, including one pointing to a raw IP address, indicating a malicious intent to redirect the user. The heuristics suggest this PDF is part of a link farm hosted on potentially compromised CMS uploads, aiming to distribute further malicious content or phish for credentials. The ML classifier and ClamAV detection strongly support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://jshtextile.com/UserFiles/file///natawo.pdf In PDF document text
    • https://imahima.xyz/js/ckfinder/userfiles/files/70145673680.pdfIn PDF document text
    • http://hanboo.cn/Uploads/file/2021072819435270554.pdfIn PDF document text
    • https://aicpwdosaeast.com/ckfinder/userfiles/files/78478102945.pdfIn PDF document text
    • https://mudateconmigo.cl/wp-content/plugins/super-forms/uploads/php/files/0d747d10726309acfd96a4a1b59f9991/93779323096.pdfIn PDF document text
    • https://nbtele.com/en/cache/fck_files/file/zazemolofenagifuxikasiw.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/pojamogikaxofebu.pdfIn PDF document text
    • https://givemeit.ru/wp-content/plugins/super-forms/uploads/php/files/5ea6a7dce33dd721ef20694813d706be/74550015371.pdfIn PDF document text
    • http://yournamebadges.com/withyourdog/cms_uploads/file/53388426401.pdfIn PDF document text
    • https://mamproducciones.es/wp-content/plugins/formcraft/file-upload/server/content/files/1612cf4ed6efc5---48897043150.pdfIn PDF document text
    • http://dishandspoonproductions.com/ckfinder/userfiles/files/51924870161.pdfIn PDF document text
    • https://malimbe.africa/wp-content/plugins/super-forms/uploads/php/files/d5bcfb4546ffa6b043dd3c718d4af572/2608839776.pdfIn PDF document text
    • http://pdww.ru/ckfinder/userfiles/files/kukovale.pdfIn PDF document text
    • http://getawaynewzealand.co.nz/wp-content/plugins/formcraft/file-upload/server/content/files/160720fb238d89---27906609765.pdfIn PDF document text
    • http://protech.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/1607f96a91799b---87476244583.pdfIn PDF document text
    • https://nguyenhungstone.com/uploads/image/files/nevigiwuwi.pdfIn PDF document text
    • http://valaptop.com/ImagesVA/file/walaxanel.pdfIn PDF document text
    • https://eclipsetheaters.com/wp-content/plugins/formcraft/file-upload/server/content/files/16105c835af695---18195624991.pdfIn PDF document text
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f87d373f2a6---wakunipakobaxetoxad.pdfPDF link annotation
    • https://www.lokalesichtbarkeit.de/wp-content/plugins/super-forms/uploads/php/files/nhoi69d3ib5c5qjfq43ofvc453/jejurivo.pdfIn PDF document text
    • https://www.sacda.org/wp-content/plugins/super-forms/uploads/php/files/m98d1q1m1gk5p8d3ilqmr081u2/biligijubidowusokukafomu.pdfIn PDF document text
    • https://www.alertgy.com/wp-content/plugins/super-forms/uploads/php/files/24e673ed837453d887ae719e9a70fc9b/30818910863.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a79d7830562---dazisinabigomixerabemaroz.pdfIn PDF document text
    • https://jiptv.nl/wp-content/plugins/super-forms/uploads/php/files/5smae7k6i8ccrijonp5j85foqo/xatanivoruwidunaxuw.pdfIn PDF document text
    • https://www.limratechnologies.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607cc101ee604---ketevavufafivunubavume.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=experimental+error+definition+pdfPDF 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_off0000d71b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD71B 17520 bytes
SHA-256: 8c7a61e10d2f6a82d6af51eac2b602140be1589df05e0eab83832dde566af20c
font_01_sfnt_off000103ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103AB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011bc2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BC2 10576 bytes
SHA-256: d1d4eaa1d02a2b62e8cd33ba79a934877d168d3a05485eb6e80e775dc90ad10d

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