Malicious PDF — malware analysis report

Static analysis result for SHA-256 81be53210c150baf…

MALICIOUS

PDF

96.1 KB Created: 2021-06-13 17:51:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 068c2f4a78832c00f4fc4769ebac6d00 SHA-1: c340d0cfdb42a57784750f2f4fe65d11adb6477e SHA-256: 81be53210c150bafe249c9f37ded9fd81829b6afd7a3fb5ccf671e353abbe45f
156 Risk Score

Malware Insights

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

This PDF document is classified as malicious, exhibiting characteristics of a phishing lure. It contains numerous links pointing to compromised WordPress sites and other domains, likely intended to redirect users to malicious content. The presence of 'Super smash bros fighter' in the document body suggests a social engineering pretext to entice clicks on these links. No scripts were extracted, but the overall structure and URL patterns are indicative of a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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=super+smash+bros+fighter PDF link annotation
    • http://aaexpansionjoint.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607057448d86e---xululijuwiti.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/c9b6170bfada58f2300b195c5531e589/sotijefuselewewateton.pdfIn PDF document text
    • http://chocolatycakes.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080d8570e8af---74795766802.pdfIn PDF document text
    • https://www.qlsny.com/wp-content/plugins/super-forms/uploads/php/files/7767c4e71d1b6ad64864ce9af407f855/roxodogetemamone.pdfIn PDF document text
    • http://taxilitomerice.cz/ckfinder/userfiles/files/weromawisi.pdfIn PDF document text
    • https://finances-canada.com/wp-content/plugins/super-forms/uploads/php/files/7d0e53fed4e40ba3b64a40c539b6edc2/94369683954.pdfIn PDF document text
    • https://unitedcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b6a1b5063cd---goxusorexuluviduduxa.pdfIn PDF document text
    • https://legouic-peinture.fr/userfiles/file/38086435428.pdfIn PDF document text
    • http://analogsys.com/uploaded/file/626497134609f0e38445dd.pdfIn PDF document text
    • http://www.mondzorgvesa-voorschoten.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160774e9097d4a---76829176351.pdfIn PDF document text
    • https://enville.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607632ceb5494---fuzutiwufojaba.pdfIn PDF document text
    • https://dermo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609869911b84d---67369830458.pdfIn PDF document text
    • https://emauto.lv/index/images/up/file/dabosafifexevimuzutuba.pdfIn PDF document text
    • http://alibabashipping.com/userfiles/file/sukam.pdfIn PDF document text
    • http://cga82.com/admin/File/bawuzadotapen.pdfIn PDF document text
    • http://alphabodysupplements.com/newerac2c/userfiles/file/fasegoxufegilotulezakuka.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013a1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A1B 5524 bytes
SHA-256: 5fa1208814a33032f16d9a5ee0ac459c03dcd20c568ba1366f09f9e2f456b7ce
font_01_sfnt_off00014cb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14CB6 11600 bytes
SHA-256: cdfb23c87c03c5d21cf4838135256ea820495ea8bd0a5f3e66e8c5fabaf83267