Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f725e38d20af0b2…

MALICIOUS

PDF

87.3 KB Created: 2021-01-08 09:59:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 2fb47308c13580ae6cfe6fbf1d3daa01 SHA-1: ea1433e9271b55f8c952495a7eaa070a2c053c37 SHA-256: 9f725e38d20af0b28e99f8043a81333a13cec344bd73169718713eb4ee0a1382
214 Risk Score

Malware Insights

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

This PDF file was identified as malicious by multiple heuristics, including a critical finding for linking to known malicious redirector infrastructure and a large number of external PDF links. The ML classifier also strongly indicated maliciousness. The embedded links, such as 'https://ggtraff.ru/123?utm_term=quilliam+foundation+exposed', suggest a phishing or content-farming attack pattern designed to drive traffic to potentially harmful sites.

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
  • 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.
  • 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://ggtraff.ru/123?utm_term=quilliam+foundation+exposed In PDF document text
    • https://kalokiran.weebly.com/uploads/1/3/4/6/134632324/wabajusizep.pdfIn PDF document text
    • https://cdn.sqhk.co/barugogip/jgjzjgr/vativakudedubaduvox.pdfIn PDF document text
    • https://cdn.sqhk.co/difanemifal/hbhjCgg/tedikotuwogosa.pdfIn PDF document text
    • https://cdn.sqhk.co/mubafazus/Qhbwizi/13820622822.pdfIn PDF document text
    • https://bumufufumobumag.weebly.com/uploads/1/3/2/8/132815806/gedowe-digole-kodoxanijaruxuj.pdfIn PDF document text
    • https://cdn.sqhk.co/lojosewude/2BUPTQO/5660596454.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451567/normal_5ff663b496182.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/54e1954d-715b-4e17-a9ab-9063749b150f/42610827379.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/886c282c-a78b-4c87-a493-09b59d54184a/affect_vs_effect_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a10e36f7-dc80-4e54-9164-291d90e21d72/danae_greek_mythology_costume.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_off000113e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113E3 5220 bytes
SHA-256: 6eda230965a12e1f8093e44cde6e98e71e7306ab12d6e117ed6ab818f4e28f82
font_01_sfnt_off000125a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125A1 13616 bytes
SHA-256: 55211a5d4bded871404e458c7c34d4eb8eec644c81f1ae2f2ac8a8fc0c9e2f4e

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