Malicious PDF — malware analysis report

Static analysis result for SHA-256 b518f183b33f05bd…

MALICIOUS

PDF

82.4 KB Created: 2021-06-13 03:42:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: ba25d5f0b87505446c9a50dfae73bcd9 SHA-1: 8506908490ef566f50facb41aad4fc1b4281745b SHA-256: b518f183b33f05bd9010731d844e2ab217d3ecac822be748da6f7dc4a43134f5
156 Risk Score

Malware Insights

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

This PDF file is classified as malicious by ML and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, directing users to compromised WordPress sites that host further malicious PDFs. The document body, though heavily obfuscated, contains text related to movie streaming, suggesting a lure to trick users into downloading malware. No scripts were extracted, but the numerous embedded URLs point to a phishing or malware distribution campaign.

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://crysiq.ru/uplcv?utm_term=mulan+2020+full+movie+123movies+free PDF link annotation
    • https://ocvirapuato.com.mx/wp-content/plugins/super-forms/uploads/php/files/ae4afef5e7cdb6fd0003670eba44bfbb/vitilabezokebalote.pdfIn PDF document text
    • https://www.andrecampbell.ca/wp-content/plugins/super-forms/uploads/php/files/75fa8f61239c8fa23eb1e65ff598025b/28662729940.pdfIn PDF document text
    • https://taxiparga.com/wp-content/plugins/super-forms/uploads/php/files/5455a8cd9abc8b4933548a16600b4de9/nareburikugosimalezo.pdfIn PDF document text
    • http://www.sarajevo-inn-grunewald.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075dbf18246a---jamakozelizo.pdfIn PDF document text
    • https://ikima.fr/uploads/file/38608776766.pdfIn PDF document text
    • http://raduzhniy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b342b510376---wumugaz.pdfIn PDF document text
    • https://earthideasawnings.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aca4263e3f1---fexidudejuvuwopefi.pdfIn PDF document text
    • https://csom.cz/wp-content/plugins/super-forms/uploads/php/files/edb6123ceed43b954596f1b02eeb5170/14505961275.pdfIn PDF document text
    • http://ridendo.cz/files/file/zufuvonekudazi.pdfIn PDF document text
    • https://www.lipfish.no/wp-content/plugins/formcraft/file-upload/server/content/files/16082789f71023---jurabazuk.pdfIn PDF document text
    • https://relleno-acidohialuronico.com/wp-content/plugins/super-forms/uploads/php/files/d9574f0195dfae7d63e276eb924f373b/keliz.pdfIn PDF document text
    • http://tofuyatogo.com/uploads/files/74977729075.pdfIn PDF document text
    • https://f1com.ge/wp-content/plugins/super-forms/uploads/php/files/15cf0b463781646f19def13a031d32c2/zojawawusiwedusovedep.pdfIn PDF document text
    • https://www.dekleinewerf.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160ab301f22298---dozarig.pdfIn PDF document text
    • http://www.microsinusectomi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d8cd5ad211---36400075339.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA06 3252 bytes
SHA-256: a169fc1576b9aadadcb70f559f274751b1ebf9f9f8b343c44d93f7b238acf751
font_01_sfnt_off0000f5a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5A6 5268 bytes
SHA-256: b2f6c6d255724556e526ebcb25ea53747bf50b3b5eb76cbbcc7688fedb5b595c
font_02_sfnt_off00010782.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10782 11444 bytes
SHA-256: a59cbbb257cf38126cf3327998006d56001644e52d1702ecf9ce01aab3cb57b2
font_03_sfnt_off00012df2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DF2 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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