Malicious PDF — malware analysis report

Static analysis result for SHA-256 626760a853407d9d…

MALICIOUS

PDF

100.1 KB Created: 2021-01-25 08:19:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 375ed414e547a82e5d2f958aa550da1b SHA-1: 1ebc9cd8d0cefedd92e26710903b4b4899666457 SHA-256: 626760a853407d9d73310badbf498446f65205e7cd33a9c4cbb02ae3214631a4
156 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, with critical heuristics indicating it is a PDF phishing attempt and a link farm. The document body, though heavily obfuscated, contains text suggesting a lure related to "Kovaly under a cruel star pdf". The presence of numerous external URLs, including one flagged as a potential link farm, strongly indicates an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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.
  • 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://druttle.ru/123?utm_term=kovaly+under+a+cruel+star+pdf PDF link annotation
    • https://vidokabotofasi.weebly.com/uploads/1/3/4/8/134868814/duxidita.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374380/normal_5fdf803dbef2b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380078/normal_5ffbd0aec9804.pdfIn PDF document text
    • https://butemupow.weebly.com/uploads/1/3/5/3/135338881/bf74465b9125a.pdfIn PDF document text
    • https://cdn.sqhk.co/dikulodut/geYrtgc/ftdx_101d_user_manual.pdfIn PDF document text
    • https://cdn.sqhk.co/libavesonon/bNozbfs/my_disney_movie_projector.pdfIn PDF document text
    • https://leresawukulet.weebly.com/uploads/1/3/1/3/131384076/nuvetixusinulipi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dofomexikokubeb.epizy.com/christmas_sax_quartet_sheet_music_free.pdfIn PDF document text
    • https://s3.amazonaws.com/tufitijinexu/bible_study_guide_sda.pdfIn PDF document text
    • https://s3.amazonaws.com/mesotodimus/10381535559.pdfIn PDF document text
    • http://gorevifero.epizy.com/d._f._s._c_full_form.pdfIn PDF document text
    • https://s3.amazonaws.com/lazolu/vewadidikawivewunudosem.pdfIn PDF document text
    • http://mowumaja.epizy.com/leadership_skills_development-_segment_2_study_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/wovugi/19549810504.pdfIn PDF document text
    • https://s3.amazonaws.com/peveziwoguxuzam/likinojemami.pdfIn PDF document text
    • http://bivadalov.epizy.com/69666586370.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_off000131d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131D2 6760 bytes
SHA-256: e2d41486eecb03e710e72245fd9bb94ba1e13ea0cfd98939ab152839078e333a
font_01_sfnt_off00014841.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14841 5280 bytes
SHA-256: dd1d3e943c37e5a2e5857f490b7b2732b37e4cf6688cb79ed38dad8e3b1ff90e
font_02_sfnt_off00015a5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15A5D 12460 bytes
SHA-256: 4cb5303707ed9d9e2723d930a728a6de1ce46fafec91265c670dde4ccfe455cc

Open this report in the interactive analyzer, or submit your own file for analysis.