Malicious PDF — malware analysis report

Static analysis result for SHA-256 7442bd775fea637a…

MALICIOUS

PDF

83.4 KB Created: 2021-06-05 17:15:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 6f9073d5aef58eb6b53ad968799990b3 SHA-1: aa910e0d2b7d5c11e4822a88261d1f14f2a4a0d0 SHA-256: 7442bd775fea637ada8c259a1a153e3fa0c78ee278b3d6631420727a3caaa411
126 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to disposable hosting and acting as a link farm, suggesting a phishing or redirection scheme. The document body, though heavily obfuscated, contains a search query related to removing lice in babies, likely a lure to entice users to click on the embedded malicious URLs. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/pbw?utm_term=como+quitar+los+piojos+en+bebes PDF link annotation
    • https://sabazufolitok.weebly.com/uploads/1/3/4/5/134585121/9255983.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373509/normal_60bafa528ae42.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403951/normal_5fcdaa609aae5.pdfIn PDF document text
    • https://venubitolaxi.weebly.com/uploads/1/3/4/3/134372432/2df4aa.pdfIn PDF document text
    • https://rowimunikak.weebly.com/uploads/1/3/5/3/135346477/0a2b91deabe1a.pdfIn PDF document text
    • https://babuluvenan.weebly.com/uploads/1/3/0/7/130739113/d445f4acda72a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369310/normal_5ffc4f7abef6a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410194/normal_600d2fc7c56c0.pdfIn PDF document text
    • https://dibugovag.weebly.com/uploads/1/3/4/7/134710264/lovuv.pdfIn PDF document text
    • https://dotubebiwujodej.weebly.com/uploads/1/3/4/7/134701593/824217d0dc0ba03.pdfIn PDF document text
    • https://lewofadexireg.weebly.com/uploads/1/3/4/8/134868993/5dec44.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://biwonuv.pbworks.com/w/file/fetch/144460323/wotudibilagel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/942a7704-69fa-4bcd-82f7-dd989c6eb7d4/hp_officejet_7612_all-in-one_inkjet_printer.pdfIn PDF document text
    • http://popuwepux.pbworks.com/w/file/fetch/144620379/rolixagazejavidukajo.pdfIn PDF document text
    • http://gozuwef.pbworks.com/w/file/fetch/144659730/bejejorokotirobibamon.pdfIn PDF document text
    • http://natofuke.pbworks.com/f/actividades_de_grafomotricidad_para_nios_de_2_a_3_aos_para_imprimir.pdfIn PDF document text
    • http://wuvebag.pbworks.com/w/file/fetch/144424671/is_k-12_effective_or_not.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/74327785-a986-452e-aece-2e1e84cba18f/what_is_an_example_of_inference_in_science.pdfIn PDF document text
    • http://jedilukiwo.pbworks.com/f/how_to_unlock_barn_finds_in_offroad_outlaws.pdfIn PDF document text
    • http://jolowajuwijo.pbworks.com/f/pusubugosox.pdfIn PDF document text
    • http://mavujeridolu.pbworks.com/f/pci_simple_communications_controller_intel_download_for_windows_10_64_bit.pdfIn PDF document text
    • http://gitefov.pbworks.com/f/elizabeth_bennet_character_analysis_essay.pdfIn 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_off0000f927.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF927 5212 bytes
SHA-256: 507ffecdc4d282a4689c1c2ff6d6208edfeffc47d85c7a5ec8063407b4e25b6f
font_01_sfnt_off00010ac6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AC6 11568 bytes
SHA-256: 22feb76c5c9eb9a714de78ee1e43cc1a1b18131ba853daea21bb4994ecca968f
font_02_sfnt_off00013068.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13068 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3