Malicious PDF — malware analysis report

Static analysis result for SHA-256 f52fe861f486058e…

MALICIOUS

PDF

80.0 KB Created: 2021-03-12 04:38:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 17697b4c68743854fc22f60fa3c620c6 SHA-1: 62297f60a8c6ef0c0ebb009c9d207a899627b73d SHA-256: f52fe861f486058e12241875821e5a318baca7aaaa34be2b5223c1a5da87ee69
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to various domains, many of which are associated with link farms and disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://nipisod.ru/wix?keyword=digiloom+starter+kit PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4453553/normal_600c64d1f09bf.pdfIn PDF document text
    • https://liwuvena.weebly.com/uploads/1/3/1/3/131398027/5d9fb.pdfIn PDF document text
    • https://dawoxojukuput.weebly.com/uploads/1/3/4/8/134890950/xisitijud.pdfIn PDF document text
    • https://sidugavumudoriz.weebly.com/uploads/1/3/4/9/134902227/kegaxuvopigim.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393186/normal_602f9455efc44.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388050/normal_602239b5e55f2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366313/normal_602e2b30e5f9b.pdfIn PDF document text
    • https://motoburibekisi.weebly.com/uploads/1/3/4/6/134623685/jikoxexosu.pdfIn PDF document text
    • http://tunezazetadu.22web.org/cheatsheet_font_awesome.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://sezigan.epizy.com/96579736694.pdfIn PDF document text
    • http://ruzafoxi.rf.gd/introduction_to_accounting_course.pdfIn PDF document text
    • http://fukevitadej.epizy.com/gotopituzeda.pdfIn PDF document text
    • http://sirilamezowi.epizy.com/41123544967.pdfIn PDF document text
    • https://s3.amazonaws.com/xowasosuf/13571443945.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d7b42de-24cb-45cb-bb4e-eb5ab4ba9b54/32132973303.pdfIn PDF document text
    • http://vemexomejolu.epizy.com/max_speed_wireless_ac.pdfIn PDF document text
    • https://s3.amazonaws.com/jikopot/33058988196.pdfIn PDF document text
    • https://s3.amazonaws.com/jijumupade/chittagong_movie_filmywap.pdfIn PDF document text
    • http://nuxumejaxumem.epizy.com/93455115751.pdfIn PDF document text
    • https://s3.amazonaws.com/dinigugaxej/23144145727.pdfIn PDF document text
    • http://vurekaxusatol.epizy.com/78444097875.pdfIn PDF document text
    • https://s3.amazonaws.com/kugelilizibuwum/english_reading_comprehension_worksheet_for_grade_6.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a8f64028-2fd6-43bf-9e8a-1591ba53cd3b/29318844175.pdfIn PDF document text
    • http://jowawotivedalox.rf.gd/notepad_compare_32_bit.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_off0000ef95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF95 4752 bytes
SHA-256: 0f3572cc55b69cfae6c256e9cc50ef098336a04f8b7a6d28cdb32af039387817
font_01_sfnt_off0000ffbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFBD 10824 bytes
SHA-256: 9e85e302a6f73ad5e0dff4a7a8d8c300a8cb9664695f767d30ec52e9693f1177
font_02_sfnt_off0001248c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1248C 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e