Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e6ff16609b3e97c…

MALICIOUS

PDF

68.8 KB Created: 2021-05-22 01:41:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 22192f64e41d5338d1e935dcd3992a18 SHA-1: 887e7e05aee1fda345cef92a76fed6e94d0715cd SHA-256: 9e6ff16609b3e97c929b76b0dfa50b650e62bfa9228bd3088cd43afc520950ab
154 Risk Score

Malware Insights

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

The PDF contains numerous external links, with a critical heuristic identifying it as a link farm. One of the primary external URIs, 'https://crophysi.ru/wb?keyword=resumen%20de%20la%20tregua%20por%20mario%20benedetti', is suspicious. ClamAV also detected this file as 'Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0', indicating a phishing or trojanized PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9920

Heuristics 4

  • 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
  • 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://crophysi.ru/wb?keyword=resumen%20de%20la%20tregua%20por%20mario%20benedetti
    • https://cdn-cms.f-static.net/uploads/4365646/normal_60618eb0cd98f.pdf
    • https://vekerarefatada.weebly.com/uploads/1/3/4/8/134868636/e87ea1c0e3bea4.pdf
    • https://kunexiravirub.weebly.com/uploads/1/3/5/3/135344507/63e22.pdf
    • https://static.s123-cdn-static.com/uploads/4496602/normal_5ff2af199d69e.pdf
    • https://tovibimatajo.weebly.com/uploads/1/3/5/9/135963052/piwuperifemul.pdf
    • https://cdn-cms.f-static.net/uploads/4460457/normal_6067cc1439f8d.pdf
    • https://xedasijaw.weebly.com/uploads/1/3/1/4/131453620/fikedaxirujud.pdf
    • https://poxovarakegi.weebly.com/uploads/1/3/5/3/135326731/xegeduf_joginakonefub.pdf
    • https://vigenuwotefi.weebly.com/uploads/1/3/4/0/134012497/xikomuxil_ruvigidaxozir_fewito_dobisibusofujej.pdf
    • https://cdn-cms.f-static.net/uploads/4403264/normal_604d2a374f59b.pdf
    • https://xukusoresi.weebly.com/uploads/1/3/4/4/134488105/4d7a7aaa7.pdf
    • https://lojavexir.weebly.com/uploads/1/3/5/9/135963097/baf9982695f23f6.pdf
    • https://xogudefimo.weebly.com/uploads/1/3/0/7/130775634/7507581.pdf
    • https://static.s123-cdn-static.com/uploads/4453335/normal_5ff9a834efb71.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/farefasejikap/diablo_3_characters_guide.pdf
    • https://s3.amazonaws.com/degisapemifa/tokij.pdf
    • https://s3.amazonaws.com/vebisop/58880023500.pdf
    • https://s3.amazonaws.com/juvuraguvutoxif/xipezuromifivibadub.pdf
    • https://s3.amazonaws.com/dupula/how_do_you_make_a_simple_trifle.pdf
    • https://s3.amazonaws.com/rexogeguxosix/cataloguing_practice.pdf
    • https://s3.amazonaws.com/luxelula/16103004939.pdf
    • https://s3.amazonaws.com/dapekufoxiraku/editable_birthday_invitation_cards_templates_free.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fd5f.bin
0ce2776af39b3e111aa3830ececa03e2aea6cff797a775ac1359e2b2fbe7ef19		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFD5F 5424 bytes

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