Malicious PDF — malware analysis report

Static analysis result for SHA-256 d04bd4630793b0d5…

MALICIOUS

PDF

92.4 KB Created: 2021-06-22 16:07:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 6ca7a6ba8c4526ae8df3ac24c9bda801 SHA-1: 62eadf383cd1f70fb299aa585c7c2f9ef396d07a SHA-256: d04bd4630793b0d5da3534dc6fe216ae0318b4f465f809a598e509877e8780e3
156 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links, many pointing to compromised WordPress sites, suggesting a phishing or malware distribution scheme. The document body, though heavily obfuscated, contains keywords related to 'war base' and application metadata, which are likely lures to encourage user interaction with the embedded links.

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://drafthe.ru/uplcv?utm_term=unbeatable+th13+war+base PDF link annotation
    • http://asesorialuishervas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac76d150667---97194845021.pdfIn PDF document text
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/d1ca068b39fa57183f99523c104a6d42/70054118195.pdfIn PDF document text
    • https://nutstudio.it/userfiles/file/90335373107.pdfIn PDF document text
    • https://homini.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160921935bd2bd---33733789737.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b10009771a0---53236361940.pdfIn PDF document text
    • http://deurwater.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb0b1a9f955---ripowifuxovematamaz.pdfIn PDF document text
    • http://www.gainerwindows.ca/wp-content/plugins/super-forms/uploads/php/files/jvd87nt5ral76u438lg1aqiha1/ragedakamowowizilid.pdfIn PDF document text
    • http://mgmkt.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16095403f8b5c0---xirenezobemitilakemewefaw.pdfIn PDF document text
    • http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/nilln6dui3jkioj201porp7n4n/delibuzitofujanabilag.pdfIn PDF document text
    • https://www.growxponential.com/wp-content/plugins/super-forms/uploads/php/files/rn854q0pq3dvqtj759hjrl5tr2/69024686172.pdfIn PDF document text
    • https://jennysbooks.com/wp-content/plugins/super-forms/uploads/php/files/e387ceb8e34386ad6065fdfea2f9fb2c/kuwifikekuraxuvodegugiz.pdfIn PDF document text
    • http://penzionriverside.cz/files/file/rulitizorete.pdfIn PDF document text
    • http://asiavent.com/UserFiles/file/%5C/jiwuver.pdfIn PDF document text
    • https://tidurmalam.com/contents//files/lanudedirolakulabek.pdfIn PDF document text
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/b0297b2665166ed443e77bb49271eba7/45318251992.pdfIn PDF document text
    • http://www.melloecastro.com/wp-content/plugins/formcraft/file-upload/server/content/files/160852988abfbf---55845267703.pdfIn PDF document text
    • http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071341800372---komusofiradebipiref.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011c13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C13 4840 bytes
SHA-256: 1015c270aeefb295753e3c6cc4f36aceadb9d0b5af5b5c2ef166103a9068e445
font_01_sfnt_off00012c87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C87 12660 bytes
SHA-256: 06f066aacf6758a287b369c73d6299417136b8ff8bca5cfea82a1e5cc9554cd2
font_02_sfnt_off000154d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x154D1 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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