Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce103a5d1fd8d95e…

MALICIOUS

PDF

75.7 KB Created: 2021-01-24 00:49:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: ceb687c4345e4c09d46021f252e3da10 SHA-1: c396e8254a07b54fe1eba1f57ca74b3903af542d SHA-256: ce103a5d1fd8d95e0e80c0464a720586f23ca2c4e0de9de889cde5f25dba12ea
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 phishing or redirecting users to malicious sites. The heuristic 'PDF_SEO_LINK_FARM' specifically indicates a large number of external links, suggesting a link farm or redirection scheme. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

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://jottigo.ru/123?utm_term=realm+defense+cheat+apk PDF link annotation
    • https://subogepaweb.weebly.com/uploads/1/3/2/3/132302814/7891241.pdfIn PDF document text
    • https://cdn.sqhk.co/jekurona/FhcEChe/high_school_girl_simulator_virtual_life_game_3d.pdfIn PDF document text
    • https://site-1168272.mozfiles.com/files/1168272/rarumekagijediner.pdfIn PDF document text
    • https://site-1166625.mozfiles.com/files/1166625/vetax.pdfIn PDF document text
    • https://muzufuwuvul.weebly.com/uploads/1/3/2/3/132302955/gutumoxejufule-tavaduxapetiz-burofo.pdfIn PDF document text
    • https://nopubogap.weebly.com/uploads/1/3/4/6/134667077/5504726.pdfIn PDF document text
    • https://xewixubigikuj.weebly.com/uploads/1/3/4/8/134892453/178757.pdfIn PDF document text
    • https://site-1171615.mozfiles.com/files/1171615/ladspa_plugins_audacity_free.pdfIn PDF document text
    • https://cdn.sqhk.co/zovitamojim/jcNm0jc/89297240515.pdfIn PDF document text
    • https://xiwabuba.weebly.com/uploads/1/3/0/8/130813639/4956735.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/fuvidokibet/switch_games_while_playing.pdfIn PDF document text
    • https://s3.amazonaws.com/vunizi/6579599906.pdfIn PDF document text
    • https://s3.amazonaws.com/sosupejuxofedo/feroxitofowuwuv.pdfIn PDF document text
    • https://s3.amazonaws.com/sinadi/apush_chapter_35_review_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/remufuzu/dijafiwidexun.pdfIn PDF document text
    • https://s3.amazonaws.com/jinabom/21334021738.pdfIn PDF document text
    • https://s3.amazonaws.com/sojaxub/article_writing_format_cbse_class_9_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/liluvad/bestandsaufnahme_gebude_protokoll.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_off0000dbf1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBF1 5000 bytes
SHA-256: 9b715c492f920df6d959af9731c9e1b3fe8e93122ce55c7aa5ce4a3be216e99a
font_01_sfnt_off0000ecd0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECD0 11856 bytes
SHA-256: dcc01139c085e5df2d7cf48c3dda1246a08a85afb51d93e1108dae23d009ab73
font_02_sfnt_off0001138a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1138A 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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