Malicious PDF — malware analysis report

Static analysis result for SHA-256 4da7fedf1c9108ed…

MALICIOUS

PDF

73.0 KB Created: 2021-02-16 05:10:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 1e7572475983052e69031729fa112475 SHA-1: 809abe294c73b5fc242c9d5b0858f2eb0b160905 SHA-256: 4da7fedf1c9108edcab00497e82479f55b5c324ce3ded41fde89cf20d2259b31
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, a common tactic for SEO poisoning or phishing campaigns. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of links, and the 'CLAMAV_DETECTION' confirms it is recognized as malicious. While no scripts were explicitly extracted, the presence of embedded URLs and the overall structure suggest an attempt to redirect users to malicious content, likely for further exploitation.

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://bologen.ru/strik?utm_term=rehras+sahib+download+pdf PDF link annotation
    • https://ziduxaxeg.weebly.com/uploads/1/3/1/3/131380546/a1eb58.pdfIn PDF document text
    • https://kigumafu.weebly.com/uploads/1/3/4/1/134131380/debanekufufasa_zixepeweragud_rinojirabok.pdfIn PDF document text
    • https://sevakozo.weebly.com/uploads/1/3/4/6/134677934/952236df.pdfIn PDF document text
    • http://cooldomen.space/mathematical_statistics_john_freund697v0.pdfIn PDF document text
    • http://cosmicgig.com/agama_jainisme7vm6y.pdfIn PDF document text
    • http://bukibiroxofin.22web.org/34804038502.pdfIn PDF document text
    • http://babysampler.com/3752276210654vyu.pdfIn PDF document text
    • https://susakatevasek.weebly.com/uploads/1/3/4/8/134871092/34059f.pdfIn PDF document text
    • https://jowovodepavilim.weebly.com/uploads/1/3/4/6/134651336/1762309.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • https://s3.amazonaws.com/vezumobigodub/ec-_council_cciso_body_of_knowledge.pdfIn PDF document text
    • http://kimisudo.rf.gd/22464394080.pdfIn PDF document text
    • https://s3.amazonaws.com/vipinib/100_cotton_fitted_sheet_single.pdfIn PDF document text
    • https://s3.amazonaws.com/forupokisip/filmora9_for_mac_free.pdfIn PDF document text
    • https://s3.amazonaws.com/kotodur/muwijuzuwixepoduf.pdfIn PDF document text
    • https://s3.amazonaws.com/fofeguj/partial_balance_sheet_accounts_receivable.pdfIn PDF document text
    • http://debalipusafuj.epizy.com/xudakowajuzeximokilogutat.pdfIn PDF document text
    • https://s3.amazonaws.com/kewakuko/bravissimo_transformado_tocomfree_2019.pdfIn PDF document text
    • http://xekibedeba.rf.gd/56092582898.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
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d2c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2C2 5368 bytes
SHA-256: 7a5e87229eaf977464ff4aeaafae87de47ea12da991cfc819bc4aa3bc10ac211
font_01_sfnt_off0000e501.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE501 6040 bytes
SHA-256: d2a6218890c2edf8a3d5031ce7b1d7e31af1d4f4205a5f613781cc0840593faa
font_02_sfnt_off0000f490.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF490 9960 bytes
SHA-256: 15223e902189134dfc33a5b3759fb9a95ed92a5dedcdc16038bb84157fb38548

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