Malicious PDF — malware analysis report

Static analysis result for SHA-256 01e89182d016a0d6…

MALICIOUS

PDF

40.1 KB Created: 2020-06-09 04:53:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 36a602ced289a2e6e03d037d473ae110 SHA-1: 8bdcadbfe13bb105cdd3b50710de03f787139ac9 SHA-256: 01e89182d016a0d654adc6f24caaa7c75130cf9a949779e76114583eed2c71c7
96 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic. The document body also contains embedded URLs, suggesting a primary purpose of directing users to a network of websites. While no scripts were explicitly extracted, the nature of the link farm and the ML classifier's high confidence indicate malicious intent, likely for SEO spam or hosting further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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.
  • 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 http://mikayladoggett.com/uploads/1/3/0/8/130813592/130813592.html#mist%25C3%25A9rio+de+corvo+corvo+de+teatro
    • http://webmail.lyoneyecosmetic.com/uploads/1/3/0/5/130590481/1043e480ef.pdf
    • http://worlds505.otherworlds-edu.com/uploads/1/3/0/7/130740143/2412028.pdf
    • http://lssda.com/uploads/1/3/1/3/131382673/edd712cc.pdf
    • http://ggaragefab.com/uploads/1/3/1/3/131379596/4f44337df.pdf
    • http://utrockclimbing.com/uploads/1/3/0/2/130291575/kejapizuna-fupavokafabi.pdf
    • http://assumptaleesteere.com/uploads/1/3/0/5/130539842/a0d32a2cad7e32.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://jogapodu.files.wordpress.com/2020/06/73598929885.pdf
    • https://sulajuxije.files.wordpress.com/2020/06/texebekanali.pdf
    • https://gufakiv.files.wordpress.com/2020/06/943371051.pdf
    • https://butisukumig.files.wordpress.com/2020/06/zezadumirapuzanuli.pdf
    • https://dadisegikew.files.wordpress.com/2020/06/29646558993.pdf
    • https://ribuvez186628289.files.wordpress.com/2020/06/22309238091.pdf
    • https://lujipur.files.wordpress.com/2020/06/94577654222.pdf
    • https://sobupex.files.wordpress.com/2020/06/84690478268.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 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006c7a.bin
1b46acff3a00492abb8d8a5df521e9992deeb600e4399e5fa10deac33c73b9e2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C7A 12772 bytes

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