Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d1ad03b8b214ca5…

MALICIOUS

PDF

97.4 KB Created: 2021-02-01 16:51:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: a89c4e2cace3b6961c16138976025d8e SHA-1: d2df4c3aae41e719d67788cb6aee06f247e60a81 SHA-256: 2d1ad03b8b214ca5550ba3b14cb4392e2201189ba356a89bc4c796ee9f7539eb
184 Risk Score

Malware Insights

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

The PDF contains a link that redirects to malicious infrastructure, as indicated by the 'PDF_MALICIOUS_REDIRECTOR_LINK' heuristic. The ML classifier also flagged this PDF with high confidence. While no scripts were explicitly extracted, the nature of the redirector suggests an attempt to lure users to a malicious site, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 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://traffking.ru/wb?keyword=queen%20greatest%20hits%20cd%20artwork In PDF document text
    • http://scarcebook.com/wopakolotoj0dvt2.pdfIn PDF document text
    • http://bepegut.iblogger.org/como_baixar_apresentao_do_prezi_em.pdfIn PDF document text
    • https://cdn.sqhk.co/junigofulum/jjqhheS/87559526560.pdfIn PDF document text
    • http://callup.today/origami_owl_braceleta8883.pdfIn PDF document text
    • https://cdn.sqhk.co/sewujuzanas/ghianjg/90785590180.pdfIn PDF document text
    • http://coloradocustomelectric.com/arch_de_triumph_romet9kq1.pdfIn PDF document text
    • https://cdn.sqhk.co/buvaboda/eRP93ih/21616563109.pdfIn PDF document text
    • https://cdn.sqhk.co/rijakobebux/gjOgjja/16821482012.pdfIn PDF document text
    • http://alex-chekalev.com/contractor_agreement_template_south_africaj9pif.pdfIn PDF document text
    • http://pifumufupes.iblogger.org/manuscript_handwriting_practice_worksheets.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://s3.amazonaws.com/votuweroxigezog/catalyst_athletics_program.pdfIn PDF document text
    • http://rozasazi.epizy.com/61949550622.pdfIn PDF document text
    • http://sikopenopod.epizy.com/free_template_drupal_7._x.pdfIn PDF document text
    • https://s3.amazonaws.com/pegozegi/zetaxujuwowotuvaf.pdfIn PDF document text
    • https://s3.amazonaws.com/dozuga/third_grade_math_vocabulary_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/miwolezedubujoz/continuous_random_variable_example_questions_and_answers.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000121d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121D2 3112 bytes
SHA-256: 6ea3db515195ca861a4ca6a3a158468711dbb6ab27b92395e6ba03b620bd538e
font_01_sfnt_off00012d01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D01 5268 bytes
SHA-256: c57c36f331d077dda15766ad847113d83821e2f7321898417b32720410f051dc
font_02_sfnt_off00013ef7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13EF7 14432 bytes
SHA-256: 83039981f20a58e95acff5711ad012f894683ab6d91fae6f806202ef40017cb2
font_03_sfnt_off00016a3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16A3B 4324 bytes
SHA-256: 8405bb6ca9a6fb718a2e910e1cdde4d74ac2122cab0061dc5f772322db9c7ccd

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