Malicious PDF — malware analysis report

Static analysis result for SHA-256 babcb0c04b47829e…

MALICIOUS

PDF

85.0 KB Created: 2021-03-20 16:22:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 7fc2f5501c0403572241bfd5f7d53f2f SHA-1: ef04a14eb24088c456e27422d5b7e656fcb8fb08 SHA-256: babcb0c04b47829eaf27e4e56c83e3a37932cb8baa27b351efd4a577faf330f9
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, with one specifically targeting a job search for a 'digital signal processing engineer japan'. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the PDF is designed to host many links on disposable domains, suggesting a phishing or scam attempt. ClamAV detection as 'Pdf.Phishing.Trojan' further supports a malicious classification, likely involving social engineering to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://pelibifir.ru/strik?utm_term=digital+signal+processing+engineer+japan PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4418984/normal_600a0936f1994.pdfIn PDF document text
    • http://erse.xyz/36030362798ah092.pdfIn PDF document text
    • http://snapchat-alert.com/nidiworumuvosukabakl5wi.pdfIn PDF document text
    • http://kuxni.su/jadifitafijunaxorakzf39v.pdfIn PDF document text
    • http://mizafaroremida.getenjoyment.net/cheng_tsui_chinese_character_dictionary.pdfIn PDF document text
    • http://wekanisa.scienceontheweb.net/daxemizifedikamu.pdfIn PDF document text
    • http://suwadebizon.mywebcommunity.org/oxford_chinese_dictionary_free_download.pdfIn PDF document text
    • http://befujukipepejem.mygamesonline.org/nazijo.pdfIn PDF document text
    • http://presentinsta.site/how_much_does_a_vw_car_service_cost5a55u.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373261/normal_5fe0d5a0e35dc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/f086ff67-7866-4b8a-9e8e-b84b345cea44/fejixasoj.pdfIn PDF document text
    • https://s3.amazonaws.com/fizufapu/jumitamovoderitunigevuz.pdfIn PDF document text
    • https://s3.amazonaws.com/sorapobuk/12843648992.pdfIn PDF document text
    • http://wozimape.onlinewebshop.net/vamilakunidujujifavegutav.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/326e8c95-c2e7-4eb5-ab66-3bd723c1ed89/46152329897.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8dcb8598-6a35-49c5-8242-36a487dcffb3/how_to_do_spss_descriptive_statistics.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ce6d991a-6118-4e43-b795-ade2cc6ae49e/what_is_the_order_of_operations.pdfIn PDF document text
    • https://s3.amazonaws.com/vufupu/lewifataxupiwune.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c5b33ae0-9d75-4f7e-a676-cc3a4e798505/the_lion_the_witch_and_the_wardrobe_summary_chapter_7.pdfIn PDF document text
    • http://jibimom.myartsonline.com/ecological_economics_download.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010c18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C18 5176 bytes
SHA-256: 08a2e36a02166cc739186fc33ac0b7f81a3ff3edc51142d5f358e0ee128a63e7
font_01_sfnt_off00011dd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DD5 12568 bytes
SHA-256: 9baa75cb36490c48115a49289eef0094771d07092d0137ee81933ed8aaf59513

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