Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f67a4f0d755178b…

MALICIOUS

PDF

104.2 KB Created: 2021-02-20 11:42:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 582759e67c5a6992012fa1ab19eab0a2 SHA-1: 26ae7c39518c7bb3c5c8a80b2e35fb5bb7a5ccac SHA-256: 8f67a4f0d755178bc3ec8b8628d1758c4434d8a27c6d3b3a2565561ca2ba4306
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to disposable hosting and are presented as search results for popular content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. While no scripts were directly extracted, the PDF structure and embedded links suggest an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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://seumenha.ru/wix?keyword=mary+poppins+1934+book+pdf PDF link annotation
    • http://malalij.iblogger.org/here_come_the_sun_piano_sheet_music.pdfIn PDF document text
    • https://radogatibemif.weebly.com/uploads/1/3/2/8/132815767/mujilipo-zogukirudezomin-posatoru-rolukovejik.pdfIn PDF document text
    • https://jizidetaji.weebly.com/uploads/1/3/4/6/134626841/1b65e13e3826d.pdfIn PDF document text
    • http://gulexamotapa.iblogger.org/kijokeluginisuzuliwox.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413375/normal_6011b41a99495.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405642/normal_5fc5bbe13eb66.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416510/normal_5fc5994c6c86b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4497369/normal_60030a34b708d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476930/normal_5ff59faeb825a.pdfIn PDF document text
    • https://jimuvidagonolab.weebly.com/uploads/1/3/1/6/131636746/xeriwasixut-nefovanal-befapusemiv-nobeva.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jojitagifuva/27810386611.pdfIn PDF document text
    • http://pojisugafini.epizy.com/how_to_get_good_at_boxing_at_home.pdfIn PDF document text
    • http://kujidexir.rf.gd/baldur_s_gate_enhanced_edition_apk_indir.pdfIn PDF document text
    • https://s3.amazonaws.com/vuforewebub/54587868667.pdfIn PDF document text
    • http://genuziga.epizy.com/togigugazuzopusixijul.pdfIn PDF document text
    • http://japorununatoj.epizy.com/67999858243.pdfIn PDF document text
    • https://s3.amazonaws.com/gelawiweza/admission_face_sheet_template.pdfIn PDF document text
    • http://jaremov.rf.gd/86358278253.pdfIn PDF document text
    • http://mubozezubudiz.rf.gd/nokezubowobavunevij.pdfIn PDF document text
    • https://s3.amazonaws.com/vukusa/35723753945.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_off00015bb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15BB2 5772 bytes
SHA-256: 2ea2e7eab80bfd1a40d977cd167fe49707f32c0b218fb34b2aa93f65c88ba21f
font_01_sfnt_off00016f7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16F7C 10532 bytes
SHA-256: f517ac5589a71d7a88ec52a4a804adc6b17cb3764c22506ed8fdafca1d5a342c

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