Malicious PDF — malware analysis report

Static analysis result for SHA-256 d34d517d4daba57f…

MALICIOUS

PDF

73.0 KB Created: 2021-03-02 09:44:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 15763a851627acdb55a3bc9940b36921 SHA-1: de27dba4d174875596ed4ddd0d8299c6489fc0f2 SHA-256: d34d517d4daba57fce0a978465f41cf15cc83850df2cc51d23fc360969ee207d
196 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many of which are part of a link farm designed to manipulate search engine results. The document body, though heavily obfuscated, contains a reference to "Maths tricks in hindi" and the authoring application, suggesting a lure to external content. The presence of ClamAV detection and ML flagging indicates malicious intent, likely related to phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://resalured.ru/strik?utm_term=maths+tricks+in+hindi PDF link annotation
    • http://tafafudezadevit.22web.org/kali_linux_default_password_vmware.pdfIn PDF document text
    • https://toxosujaduwo.weebly.com/uploads/1/3/0/8/130874389/1085595.pdfIn PDF document text
    • https://folenepawesig.weebly.com/uploads/1/3/2/6/132680852/8f28037a0c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kikesij.epizy.com/fuxoporemosilivepitikibi.pdfIn PDF document text
    • http://jasunusemoki.onlinewebshop.net/pitalokenufidimisajo.pdfIn PDF document text
    • https://s3.amazonaws.com/luxelula/cheppave_chirugali_movie_bgms.pdfIn PDF document text
    • http://forezepolutaju.onlinewebshop.net/11449801202.pdfIn PDF document text
    • https://s3.amazonaws.com/fonibinaraj/70013200415.pdfIn PDF document text
    • http://javewexo.epizy.com/26073702892.pdfIn PDF document text
    • https://s3.amazonaws.com/mozirolinitaje/14876556520.pdfIn PDF document text
    • https://s3.amazonaws.com/xaliwalufoguni/write_a_formal_letter_to_your_teacher.pdfIn PDF document text
    • https://s3.amazonaws.com/vaxebisapesi/cameo_performance_meaning_in_english.pdfIn PDF document text
    • https://s3.amazonaws.com/dinilederu/indianapolis_airport_map.pdfIn PDF document text
    • https://s3.amazonaws.com/bagokiko/sekowarepo.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_off0000e386.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE386 5064 bytes
SHA-256: 88334446401d03a2d556cfeb5da255d489bbbcb6c1835bea9c63717904659016
font_01_sfnt_off0000f4c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4C0 10164 bytes
SHA-256: 0161de76f195da68e395c9b85564bdabc18384da068e7e9ea3401bff1a03c469

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