Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6d876ddaa7f7d37…

MALICIOUS

PDF

75.5 KB Created: 2021-03-21 05:31:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 1dc3eb0e2e427c1ad98f43be2585f215 SHA-1: 21187af2025781a59dba68ee986c6d657d77fa24 SHA-256: e6d876ddaa7f7d37143e33d8744b5b868e49ca037b05605bf1cfd40bb5da277b
186 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm or SEO poisoning tactic. One prominent URL, 'https://baarspo.ru/wix?keyword=wwe+supercard+hacks+free', is presented in a way that mimics a search result, likely to trick users into visiting potentially malicious sites. No scripts were extracted, but the PDF structure and numerous external links indicate a high likelihood of phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 6

  • 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 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.
  • 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://baarspo.ru/wix?keyword=wwe+supercard+hacks+free PDF link annotation
    • https://cdn.sqhk.co/xiruregexibe/fWGgfii/online_photo_editor_sparkle_effect.pdfIn PDF document text
    • https://cdn.sqhk.co/kulukopupiw/jjhagcl/what_is_the_meaning_of_christianity_symbol.pdfIn PDF document text
    • http://sugoxebojun.getenjoyment.net/interview_questions_for_hr_executive.pdfIn PDF document text
    • https://cdn.sqhk.co/mapetidul/VmkDje7/78484995554.pdfIn PDF document text
    • http://tufepuwaw.iblogger.org/excel_nur_bedingte_formatierung_bertragen.pdfIn PDF document text
    • https://cdn.sqhk.co/fiseguvugele/dgdggic/booboo_stewart_sister.pdfIn PDF document text
    • https://cdn.sqhk.co/rufopunuk/jf9yfhi/10773142876.pdfIn PDF document text
    • http://gudokav.sportsontheweb.net/vogavenukesudim.pdfIn PDF document text
    • https://cdn.sqhk.co/wuwoxegolewa/fgghhdm/19407489199.pdfIn PDF document text
    • https://cdn.sqhk.co/fobonelaga/rhjXhjD/33669395844.pdfIn PDF document text
    • https://cdn.sqhk.co/sezabaxo/ahjc1jd/pipuxijiruzelukunugefo.pdfIn PDF document text
    • http://vitonidero.medianewsonline.com/timifabolisededatu.pdfIn PDF document text
    • http://rexonina.medianewsonline.com/15581535507.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nozimazanu.epizy.com/about_google_analytics.pdfIn PDF document text
    • https://167c2301-eccc-4e3a-a609-38a4f17b9bf8.filesusr.com/ugd/b1dabf_de2e1772a2f0480781d87913ac8a1a4f.pdf?index=trueIn PDF document text
    • https://67dc9804-4028-4298-afd7-d431d2c16fe6.filesusr.com/ugd/559c84_2a26c7646d0a49a785106b256dcf173d.pdf?index=trueIn PDF document text
    • http://lesiterifok.epizy.com/5973138683.pdfIn PDF document text
    • https://s3.amazonaws.com/daniwodug/microservices_with_spring_cloud_udemy.pdfIn PDF document text
    • http://dadagax.epizy.com/pros_and_cons_of_artificial_intelligence.pdfIn PDF document text
    • https://s3.amazonaws.com/kaxukok/79677809698.pdfIn PDF document text
    • https://s3.amazonaws.com/remuv/algoritmo_cubo_rubik_4x4x4.pdfIn PDF document text
    • https://s3.amazonaws.com/tizowodifi/my_bloody_valentine_2009_parents_guide.pdfIn PDF document text
    • http://juvusowupu.onlinewebshop.net/adlerian_family_therapy.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_off0000e98f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE98F 5380 bytes
SHA-256: bc3c98121ed9ab05cd3c74b0223d9f88765abf3d636066c8e2a26e2261ab1f8e
font_01_sfnt_off0000fbf2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBF2 10764 bytes
SHA-256: a2231aba5791cb51e55f7e963064747034451e2c4a8d747ab46ce1b519884d1a