Malicious PDF — malware analysis report

Static analysis result for SHA-256 9607dc6df31126d3…

MALICIOUS

PDF

100.3 KB Created: 2021-03-30 10:33:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b145131d0ae6b805144a7053f72b0f89 SHA-1: a929d89e78c0c0dbb2e58ec880cb5bbefa0acd0d SHA-256: 9607dc6df31126d34d184540b342a8bf99339f8c01568059a14e9c8ec5fc20cc
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many of which are generated in a pattern typical of SEO spam or phishing campaigns. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting an attempt to drive traffic to malicious or deceptive websites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution via these external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://kuzutuzo.ru/wix?keyword=hunter+x+hunter+2011+ost+3
    • https://mogudigadoto.weebly.com/uploads/1/3/2/6/132695399/sekiteravokemo-vugaroforepa-votajud.pdf
    • https://static.s123-cdn-static.com/uploads/4375514/normal_5fc896e39f6f2.pdf
    • https://xibijogoxedugo.weebly.com/uploads/1/3/4/6/134662411/losadolib_xoturadat_xudisabazezeg_kugisemawajasa.pdf
    • https://cdn-cms.f-static.net/uploads/4379719/normal_6009f58d3720b.pdf
    • https://cdn.sqhk.co/wagomito/hihi5ji/dedik.pdf
    • http://tesupelaj.sportsontheweb.net/livro_catecismo_da_igreja_catlica_editora_loyola.pdf
    • https://bilunoxenaxu.weebly.com/uploads/1/3/4/4/134474733/8dcd22.pdf
    • https://cdn.sqhk.co/salenasova/bX24iaz/62864399770.pdf
    • https://satizivuzaked.weebly.com/uploads/1/3/4/3/134383512/ac840caab3.pdf
    • https://cdn-cms.f-static.net/uploads/4456420/normal_6044753820382.pdf
    • https://cdn-cms.f-static.net/uploads/4369766/normal_605d6a407859f.pdf
    • https://fumitalabojaluk.weebly.com/uploads/1/3/5/3/135399187/xanifagataru_xiwemobepewa_dosuwuran_rudotolepasez.pdf
    • https://kitabenulo.weebly.com/uploads/1/3/0/9/130969432/9117070.pdf
    • http://dapurixid.sportsontheweb.net/aadhar_download_open_password.pdf
    • http://wobafobigo.mywebcommunity.org/how_to_prepare_for_a_successful_interview.pdf
    • https://cdn.sqhk.co/zanemulazif/osja4UD/xukepotumeraxa.pdf
    • https://sogutujugaj.weebly.com/uploads/1/3/4/4/134403955/467d46f79bfce5.pdf
    • https://cdn.sqhk.co/vumulevezuf/ieji1ig/maxeboxedaxafasidotej.pdf
    • https://cdn.sqhk.co/dasewugiru/J2Hvhg1/patesazenose.pdf
    • https://static.s123-cdn-static.com/uploads/4454043/normal_5fe4d96448727.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://moxosutemow.onlinewebshop.net/bosalapibuzoxonoridituvi.pdf
    • http://kuxubakelixuzot.atwebpages.com/oxford_advanced_learner_s_dictionary_download_free.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012b6a.bin
ebfbc36b82b0caf9c77270172bc5603c3033f34eb4af3401f8f7fa01fceb912b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12B6A 3776 bytes
font_01_sfnt_off000138e1.bin
fb6c50a1a18fd2d231418b347ecb6e38f0c3dfe781b98599d9058f32dba63230		 pdf-font-stream PDF embedded font (sfnt) at offset 0x138E1 5052 bytes
font_02_sfnt_off00014a0f.bin
7cd14e64fa00c216d679c69fddc7a4df77e9b1d1085e6acb20df297e92c796ed		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14A0F 10596 bytes
font_03_sfnt_off00016e14.bin
60f53b17f7925ac1818ac9336ea58fd206fea48872b5377b70e6fb8114080afd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16E14 16132 bytes

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