Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e4e50b45611323f…

MALICIOUS

PDF

33.6 KB Created: 2020-06-02 02:40:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2603d088a02750ef304b3bea62bcfde9 SHA-1: 281c4126b1c1bc8dd36de0e8f8c974bdf2ab57c6 SHA-256: 1e4e50b45611323f8feece637e45b41a5a0c369c9af712d9fb95ca942c4a3c0b
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File

The PDF file contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various domains. The ML classifier also strongly indicated maliciousness. The document body contains text related to 'Turbo c 4. 5 for windows 10' and application metadata, suggesting a lure to download or interact with potentially malicious software hosted on the linked sites. The primary attack pattern involves redirecting users to these external resources.

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://vsemdaryu.site/uploads/1/3/0/8/130813401/130813401.html#turbo+c+4.+5+for+windows+10
    • http://_mta-sts.mx.quilcenebiblechurch.org/uploads/1/3/1/3/131398369/lutalo.pdf
    • http://webmail.everywherehope.org/uploads/1/3/0/8/130813514/bilolidamafofav.pdf
    • http://coastalcateringfl.com/uploads/1/3/0/3/130323174/6910299.pdf
    • http://cottoncache.net/uploads/1/3/1/4/131454435/9554343.pdf
    • http://bestfriendsbakery.net/uploads/1/3/0/2/130291474/busij.pdf
    • http://bazarconstruindosonhos.com/uploads/1/3/0/5/130543537/a2d03.pdf
    • http://matthewbrady.net/uploads/1/3/0/5/130543279/bbb664.pdf
    • http://bmcclassics.eu/uploads/1/3/1/8/131857970/nolakinofar-momori.pdf
    • http://vsemdaryu.site/uploads/1/3/0/8/130813401/terms.html
    • http://vsemdaryu.site/uploads/1/3/0/8/130813401/dmca.html
    • http://vsemdaryu.site/uploads/1/3/0/8/130813401/policy.html
    • https://tarajab.files.wordpress.com/2020/05/moxalogofopowepom.pdf
    • https://xapapepukafu952058358.files.wordpress.com/2020/05/xawamovoruwukemu.pdf
    • https://kunemepor.files.wordpress.com/2020/05/wugoselalanigafad.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/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000057ae.bin
083e000b18806ac80c9d11ecf87488df540ced7f8e534a13c0e5d28b58ea9715		 pdf-font-stream PDF embedded font (sfnt) at offset 0x57AE 10452 bytes

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