Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e20458e1ad936a0…

MALICIOUS

PDF

92.6 KB Created: 2021-06-21 04:00:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: ab7fd96c4cf7138150a6e2d1c6ff9808 SHA-1: 1c87f4bf7fe0ea7ed00a1eb977093a8140f021d7 SHA-256: 5e20458e1ad936a081f758418d67a539e5042514844ba835c59ffb5863cdd27d
156 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious. It contains a link farm pointing to compromised WordPress upload storage, suggesting it's used for distributing malicious files. The document body, though heavily obfuscated, appears to be a lure related to 'pubg mobile mod apk download unlimited money', aiming to trick users into clicking the provided links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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 http://reiki-roots.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16085e3dcc1f5d---wevoviverawiw.pdf In PDF document text
    • https://www.generalutilities.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086811f117fd---mepogugodoxid.pdfIn PDF document text
    • http://mini-garden.ru/userfiles/file/zufawidasapumo.pdfIn PDF document text
    • http://themultifold.com/wp-content/plugins/super-forms/uploads/php/files/vp57ipuv906ffe1vgump2oh9u5/85824165456.pdfIn PDF document text
    • https://www.kiteschule-kiel.de/wp-content/plugins/formcraft/file-upload/server/content/files/160aa3e8438531---96594663247.pdfIn PDF document text
    • https://best-turbos.com/wp-content/plugins/super-forms/uploads/php/files/adf48a824db0b39304b332181c409f27/vebegivuta.pdfIn PDF document text
    • https://driftwoodcc.com/userfiles/files/55133786938.pdfIn PDF document text
    • https://www.revistadefiesta.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081fefa4ed7a---5394808874.pdfIn PDF document text
    • https://www.unicodesystems.com/wp-content/plugins/super-forms/uploads/php/files/4q53onu8ici7vsrvq6746121h4/80937638551.pdfIn PDF document text
    • https://www.inkfactory.pk/wp-content/plugins/formcraft/file-upload/server/content/files/160c2c07389a9d---jereve.pdfIn PDF document text
    • http://jagatjyotischool.org/jagatjyotischool/userfiles/file/motisuwomasadotorogat.pdfIn PDF document text
    • https://yziact.fr/wp-content/plugins/super-forms/uploads/php/files/fsnuro37dconkbkro7ib484apn/novudakop.pdfIn PDF document text
    • http://recamonde.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c9ca4d5f07a---87306344784.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=pubg+mobile+mod+apk+download+unlimited+moneyPDF 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://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f595.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF595 5404 bytes
SHA-256: 6ca245df5e1d845a4553d46a7cc3d49447e5cbb68de85281c9a9db4a90feb345
font_01_sfnt_off000107f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107F6 6348 bytes
SHA-256: 099182dce94e4efab5fc5943ac5848150ef1ae0f56376fdc52675083a5d227d9
font_02_sfnt_off00011d29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D29 12604 bytes
SHA-256: 66af862430935523965968a63f18ad43533a9a163952ad9485c0eb525d3a8074
font_03_sfnt_off0001476b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1476B 16304 bytes
SHA-256: 8fe31ac2096c5e11ca20e474ac9d4b0e624cd7c6a3d6648e58269b78a2b36287
font_04_sfnt_off00015ccf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15CCF 1736 bytes
SHA-256: 74be5bc4d46f64e5c506ae1006f7022dc98ebf960e37c7bf417c2027ca73106d

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