Malicious PDF — malware analysis report

Static analysis result for SHA-256 30779e60bd76f210…

MALICIOUS

PDF

77.2 KB Created: 2021-03-16 01:29:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c2775f9747f1a08f3598fcfc97fae9d6 SHA-1: e2ecbee8e934bc085cf973d6ac44213fb3afc2fc SHA-256: 30779e60bd76f210b5f7a9bfecd1cbaa12adf1dd75afd8dab862947f95d8c41a
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, a technique often used for SEO manipulation or to redirect users to malicious sites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. No scripts were extracted, but the PDF structure itself facilitates the attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://soxebez.ru/award?keyword=a+whole+new+world+twisted+tale+pdf
    • https://tolajugim.weebly.com/uploads/1/3/4/6/134647220/7379872.pdf
    • https://cdn.sqhk.co/tejosepu/jE4igfj/girimuzelanitefod.pdf
    • https://memuwumobodedo.weebly.com/uploads/1/3/5/9/135974490/pexuf.pdf
    • https://raxorevowipafe.weebly.com/uploads/1/3/4/7/134765671/b75e25fc4badb.pdf
    • https://cdn.sqhk.co/waxolulum/8oeOjjc/gigusunorakipojusaxi.pdf
    • https://jazezuko.weebly.com/uploads/1/3/4/3/134389352/nawerobo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://56db2a4d-09ce-4ff6-a558-abb1d6727cd4.filesusr.com/ugd/003b86_cb56b1e2e87c499da77d8ca311c919bc.pdf?index=true
    • https://s3.amazonaws.com/nafamaragisek/74150466178.pdf
    • https://c3a7a64c-5591-430b-94d7-c2eadfdf3523.filesusr.com/ugd/966478_9b9d9e1c4c614079817f02ca0ca49148.pdf?index=true
    • https://0f7a2101-273c-4f7f-b1fd-079d1ad923c1.filesusr.com/ugd/a7ea6f_2a17c577c0544bf59242979ba10c6857.pdf?index=true
    • https://s3.amazonaws.com/risisipajole/57857444529.pdf
    • https://s3.amazonaws.com/paxivogedewilu/44042505857.pdf
    • https://s3.amazonaws.com/najipavez/jiwivimo.pdf
    • https://5c3e38fa-bf2d-4cda-bfdc-19e9a39f2227.filesusr.com/ugd/b3ada4_f33e90f4f65e490f81b0534e32c1db30.pdf?index=true
    • https://s3.amazonaws.com/wajibile/ganong_physiology_book_free_download.pdf
    • https://s3.amazonaws.com/pibajuwi/lapaforan.pdf
    • https://f0198b83-f3fe-41b4-8315-bacd7eabb238.filesusr.com/ugd/2b3f46_cae8ff90e7454837a62c581f761a2bfa.pdf?index=true
    • https://85d2c5a2-fc31-4f76-86b4-4ebe2abe2bf4.filesusr.com/ugd/a8cc01_51e028a612624e748328d40345264b5e.pdf?index=true
    • https://s3.amazonaws.com/savukojubusum/canon_rebel_xti_manual_espaol.pdf
    • https://s3.amazonaws.com/wazorixekunafob/32519178171.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eefa.bin
44e4205faf1059c3468d31916886622fbcb8fcd830628a977676c38b64039034		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEEFA 5208 bytes
font_01_sfnt_off000100ba.bin
70715f7859893b68523330b0e291970c90747d650e378972c797d4a3a1c99c0d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x100BA 11696 bytes

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