Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b897b5d994775e6…

MALICIOUS

PDF

48.0 KB Created: 2020-06-03 02:43:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e0daa080466e8cf116cb95181deea7ec SHA-1: 4fb2fa512ebf83aac2cda03219151ae5e029501a SHA-256: 2b897b5d994775e633c2555429560054cf83dfb49787038e628e8e66cb6a8cfd
96 Risk Score

Malware Insights

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

This PDF file exhibits characteristics of a link farm, containing numerous external links to other PDF files. The primary lure appears to be a fake free download for 'Information technology for management 9th edition pdf'. The ML classifier strongly indicated maliciousness, and the PDF_SEO_LINK_FARM heuristic confirms the presence of a large number of external links, suggesting a distribution mechanism for further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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://boxinyulechengdaili.br3h.com/uploads/1/3/0/5/130540063/130540063.html#information+technology+for+management+9th+edition+pdf+free+download
    • http://laceymoore.com/uploads/1/3/1/3/131383770/wewuma_gumupo.pdf
    • http://businessstrategyandresearch.com/uploads/1/3/0/2/130287735/wifejutedajon.pdf
    • http://webdisk.lindsaywheeler.com/uploads/1/3/0/7/130776205/wuzamen-tinojimikiliven-jasot.pdf
    • http://74-123-79-229.mgwnet.com/uploads/1/3/1/0/131070166/b98035c9efcae.pdf
    • http://wendymckenna.com/uploads/1/3/0/7/130740466/f069f70.pdf
    • http://kblawncaresolutions.com/uploads/1/3/0/2/130289341/17ad62.pdf
    • http://najwaali.com/uploads/1/3/0/8/130873875/8542339.pdf
    • http://aprilbaskin.com/uploads/1/3/1/6/131606000/800716.pdf
    • http://caifu.blog/uploads/1/3/0/2/130272267/tugekofepanutekamovu.pdf
    • http://boxinyulechengdaili.br3h.com/uploads/1/3/0/5/130540063/terms.html
    • http://boxinyulechengdaili.br3h.com/uploads/1/3/0/5/130540063/dmca.html
    • http://boxinyulechengdaili.br3h.com/uploads/1/3/0/5/130540063/policy.html
    • http://businessstra
    • https://tevuvivirij.files.wordpress.com/2020/06/77931569959.pdf
    • https://wuxodiso.files.wordpress.com/2020/06/bogazulinuluxaxifurabo.pdf
    • https://mijozorajop.files.wordpress.com/2020/06/48969632023.pdf
    • https://fobelirutoj.files.wordpress.com/2020/06/17140562102.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_off00008e56.bin
f7805b590cbe63c6eaeeb07835ed7c4a0b43e61104dad4fd67a06c9f8295b354		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8E56 10844 bytes

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