Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e65148a5aa88e62…

MALICIOUS

PDF

85.1 KB Created: 2021-06-12 16:08:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 00258de0046963845dbfafa12c98bdad SHA-1: 03f0f1e0f52d5f1091673c01cbd2241f77fe8f8c SHA-256: 0e65148a5aa88e620b1e27d4b154382195d0b05ad349f5cafae905b025603bca
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier indicating a high probability of maliciousness. It contains a link farm with numerous URLs pointing to compromised WordPress sites and disposable hosting, suggesting an attempt to redirect users to malicious content. The presence of embedded URLs and the nature of the link farm indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://queure.ru/uplcv?utm_term=dragon+ball+budokai+tenkaichi+3+rom+wii PDF link annotation
    • http://dabaizhongxue.com/upload_fck/file/2021-6-9/20210609003820892075.pdfIn PDF document text
    • https://xn--78-6kce7dfhb9dwb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/66ceca3a341cba107bdfce243bf30934/41957585415.pdfIn PDF document text
    • https://majorsagilekvaros.hu/uploads/file/93133763036.pdfIn PDF document text
    • https://alrashed-alsaleh.com/userfiles/files/52331160420.pdfIn PDF document text
    • https://www.enviedecrire.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099487d5c6c3---31821872890.pdfIn PDF document text
    • https://alismobile.co.uk/wp-content/plugins/super-forms/uploads/php/files/cf24ae3c3cbf4bbf05551ee27f339da8/90355170359.pdfIn PDF document text
    • https://kuechentreff-schmid.de/wp-content/plugins/super-forms/uploads/php/files/d7k0u1n5npd6v1rf426pcjr4lh/31410840431.pdfIn PDF document text
    • http://lalitas-thaimassage-spa.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a9ff3555dfa---37725886539.pdfIn PDF document text
    • http://mispuntossaga.com/campannas/file/49408072622.pdfIn PDF document text
    • https://pima-alarms.net/slicice/file/35228311877.pdfIn PDF document text
    • http://tubietelbar.hu/uploadfile/68574062578.pdfIn PDF document text
    • http://arcdesantmarti.com/biocop/Images/images-editor/file/83656569537.pdfIn PDF document text
    • http://saharun.org/uploads/ckfinder/userfiles/files/bubamap.pdfIn PDF document text
    • http://asesorgubernamental.com/images/file/7992092347.pdfIn PDF document text
    • https://comesa.com.pe/wp-content/plugins/super-forms/uploads/php/files/m7klukgflpvs3e57eq55sbgam2/85729353685.pdfIn PDF document text
    • http://dlmberatung.ch/userfiles/files/dametiweluvuvabupurigusir.pdfIn PDF document text
    • http://furkansigorta.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1606cd14d8cfc6---52762965508.pdfIn PDF document text
    • http://www.melodypods.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7e2662b76f---56019740468.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e2d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2D2 5636 bytes
SHA-256: 052cb833d170dda04153524eaa22abb2475a4e678d07ddc78d95ade509d29e18
font_01_sfnt_off0000f5e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5E2 3648 bytes
SHA-256: 5deedea67faf4700ab2275527717dd9594bb2031fbccdd059991b7c4a78f5ca8
font_02_sfnt_off0001032d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1032D 14752 bytes
SHA-256: a8b8cc2d28a5540a2afd5cb40f52d5dfaed8f1588423c36df730f894003ef668
font_03_sfnt_off00013148.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13148 16144 bytes
SHA-256: 038b4a7cb107495dd0282975b93fe1d3f1bc6efe4bbe3efe2e123882a19cbbee

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