Malicious PDF — malware analysis report

Static analysis result for SHA-256 2203fdcaffe51548…

MALICIOUS

PDF

85.2 KB Created: 2021-06-28 01:01:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: cc9d9bd0ae98bb86ebaa64dd7215ec88 SHA-1: 30d8edef88a485d42066624f4e7aa89ed8e5f55b SHA-256: 2203fdcaffe515486df786a2a8d12c443aba97f732b47912d4364f423cd8c364
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous URLs pointing to various websites, many of which appear to be compromised WordPress installations or disposable hosting. The primary purpose seems to be directing users to potentially harmful content, consistent with phishing or malware distribution tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

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://oniceh.ru/uplcv?utm_term=pdf+file+converter+into+ms+word
    • http://yesilderecine.com/admin/editor_resim/file/6785146700.pdf
    • http://lynxitservices.com/ckfinder/userfiles/files/juteronoxebata.pdf
    • https://djhelaly.com/wp-content/plugins/super-forms/uploads/php/files/1cc872f313fb799edf728cb529e5a1a3/21739960390.pdf
    • http://www.greenbriarpropmgmt.com/wp-content/plugins/super-forms/uploads/php/files/8b64da88d637d677594fe5d47c33b4ce/laxizezanepewom.pdf
    • http://bangkoksolarpower.com/syner_upload/images/files/37342284200.pdf
    • https://xn--78-6kce7dfhb9dwb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/80178f4b8c316656be9b1d1c5b2ff956/58463733458.pdf
    • http://come2menorca.com/images/file/70665169016.pdf
    • https://loskutova.site/wp-content/plugins/super-forms/uploads/php/files/47d05f03226b3bd66cfa621f174b8c30/90297555778.pdf
    • https://agribusiness.pk/wp-content/plugins/formcraft/file-upload/server/content/files/160d8f3e77a9a1---76177356568.pdf
    • http://furkansigorta.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160a00aba8f0c1---44417187636.pdf
    • http://brodart01.com/wp-content/plugins/super-forms/uploads/php/files/2jrdgcua59k4mccrfpjk6vo388/wiwajivenebojisupo.pdf
    • http://traditionsradio.com/wp-content/plugins/super-forms/uploads/php/files/dkn4qd09gsrifmqa6pcuqu2s87/birujupebajodamedaferota.pdf
    • https://wccia-vastu.com/wp-content/plugins/super-forms/uploads/php/files/a74e4d7be5deddb88e61c4fb77a7f9e2/tuvenipifog.pdf
    • http://szakkepzosiklos.hu/upload/file/digazi.pdf
    • https://xn--78-6kce7dfhb9dwb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/8d9d4d1ae73315a185c4baca462134bf/44171769533.pdf
    • http://consulcongress.it/uploads/assets/file/13176452815.pdf
    • http://lulanjina.net/upload/files/97983033251.pdf
    • http://darec.sk/files/files/86676500116.pdf
    • http://autohondl.cz/userfiles/file/89624419537.pdf
    • http://maytinhtuyenquang.com/home/maytinhtuy/domains/maytinhtuyenquang.com/public_html/images/file/gavizazijofuvo.pdf
    • http://alibabashipping.com/userfiles/file/mawivomanerusakek.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e8bc.bin
d84738ce89797b53ac2a513302d52ea45cf1f7cbe51b255f90569c5350a49a0c
pdf-font-stream PDF embedded font (sfnt) at offset 0xE8BC 17628 bytes
font_01_sfnt_off0001172c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1172C 16792 bytes
font_02_sfnt_off00012f43.bin
e9e0a5998be8b70c9a084d69dcdc796f14ae68c2679ddda17cad99c13499c92d
pdf-font-stream PDF embedded font (sfnt) at offset 0x12F43 10628 bytes