Malicious PDF — malware analysis report

Static analysis result for SHA-256 9db068d82190a68e…

MALICIOUS

PDF

85.8 KB Created: 2021-01-09 00:49:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 109c9292b8c4cd1bc3a3222c4d610a8c SHA-1: db0c056f76c87fe6d73fde0600b8eda046ef5178 SHA-256: 9db068d82190a68eba4978bfe37979bcf65de4fac2a2845eb78113ddd347636e
244 Risk Score

Malware Insights

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

This PDF file contains a large number of embedded links, many of which point to known malicious redirector infrastructure or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or SEO spam campaigns. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.
  • 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://gettraff.ru/wb?keyword=literary%20devices%20ballet In PDF document text
    • https://cdn.sqhk.co/wufevinek/iggcggi/fitex.pdfIn PDF document text
    • https://figotuzu.weebly.com/uploads/1/3/4/5/134579221/3568987.pdfIn PDF document text
    • https://cdn.sqhk.co/zolaxadivowe/Jjfjf5g/42050462206.pdfIn PDF document text
    • https://zubirutis.weebly.com/uploads/1/3/4/6/134640120/ee3aa8efb222d8.pdfIn PDF document text
    • https://cdn.sqhk.co/birenejar/gMQwjgc/jump_rope_or_running_for_weight_loss.pdfIn PDF document text
    • https://cdn.sqhk.co/fufejapopunu/ja7jh3D/nanobikibapagotowerofasad.pdfIn PDF document text
    • https://varipejat.weebly.com/uploads/1/3/0/7/130739080/seten-vuzovoniki-nasuner-pokezopetep.pdfIn PDF document text
    • https://cdn.sqhk.co/zubuwebofe/icujahb/xevinemamawiru.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412778/normal_5fa3615e3201f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426967/normal_5f9a80d21f210.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379029/normal_5fc8272ef32d5.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
    • https://uploads.strikinglycdn.com/files/3ec8e24c-428b-46fa-90e5-15ba88059b62/68848877916.pdfIn PDF document text
    • https://s3.amazonaws.com/savukojubusum/mudikibujapafoto.pdfIn PDF document text
    • https://s3.amazonaws.com/donukadizolin/atal_bihari_vajpayee_kavita.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/39debd00-1016-4a67-a507-0367c2aede03/prince_hall_grand_lodge_of_wisconsin.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_off00010859.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10859 4748 bytes
SHA-256: b6a583f7ab0652f01cc110ab6895a460d3ed637ce024de0e17f9a21f0743c364
font_01_sfnt_off00011893.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11893 10316 bytes
SHA-256: 2a0a338af1d155956c6245fde76eba7cfbe9bea54071b415d8e8570ea673f313
font_02_sfnt_off00013bf5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13BF5 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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