Malicious PDF — malware analysis report

Static analysis result for SHA-256 315fb6100cdb7d39…

MALICIOUS

PDF

46.2 KB Created: 2020-03-23 03:25:39 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 23b9ec67fa514b3e6012458d5ad3ee6e SHA-1: bf879b85046eefa5e2fc2ad97f68b255b5e83bfb SHA-256: 315fb6100cdb7d39ab4e2d0a978721dcca17eeb8b822392acfa099854b6c4682
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Phishing: Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of external links, many of which point to other PDF files, suggesting a link farm designed to attract traffic. The document body mentions 'Minecraft team extreme launcher 3.5.1 download free', indicating a lure for potentially unwanted software. The ML classifier strongly flagged this PDF as malicious.

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://jasonis40.com/uploads/1/3/0/2/130273573/130273573.html#minecraft+team+extreme+launcher+3.5.1+download+free
    • http://saintclairstorage.com/uploads/1/3/0/5/130588511/58b430e193df.pdf
    • http://www.bflairsoft.com/uploads/1/3/0/8/130813614/vabakinerurokikela.pdf
    • http://naufalsamudra.com/uploads/1/3/0/7/130775378/ravikanunivekobu.pdf
    • http://www.montertainment.club/uploads/1/3/0/7/130739016/f681fce.pdf
    • http://metrolinasprinkler.com/uploads/1/3/0/6/130640047/aca0e124fae5122.pdf
    • http://fibromyalgiamadesimple.com/uploads/1/3/0/8/130814717/b0a27ef0736.pdf
    • http://newdaypsychiatricservices.net/uploads/1/3/0/8/130813531/dafizarek.pdf
    • http://kacigracedesigns.com/uploads/1/3/0/6/130639377/6007420.pdf
    • http://nicolesnaturals.blog/uploads/1/3/0/7/130775131/cc3b806.pdf
    • http://southernor.com/uploads/1/3/0/6/130621589/0dd1fad2.pdf
    • http://langlandsabbot.com/uploads/1/3/0/6/130620557/gabugib.pdf
    • http://freezebreezemechanicals.com/uploads/1/3/0/5/130589214/manijonulegava-vikoxijuwone-takegatijudem.pdf
    • http://www.myhipdesigns.com/uploads/1/3/0/4/130476074/9654590.pdf
    • http://camptruth.us/uploads/1/3/0/7/130739011/zuwefo-jabarinaru.pdf
    • http://business360fl.com/uploads/1/3/0/8/130814129/820297.pdf
    • http://716howard.com/uploads/1/3/0/4/130483546/4029274.pdf
    • http://evergreenfusion.com/uploads/1/3/0/5/130543261/63922edaad2.pdf
    • http://mohamoudegal.com/uploads/1/3/0/2/130271049/wafexogexeridafodezo.pdf
    • http://internetarchitect.net/uploads/1/3/0/5/130540072/9982200.pdf
    • http://greyheartshomeware.com/uploads/1/3/0/2/130291499/xuxokaselo_mozefinofelim_nexizeronel_pimevobeb.pdf
    • http://genevatennis.net/uploads/1/3/0/2/130272554/191dda1ada.pdf
    • http://www.bloomfield-laser.com/uploads/1/3/0/7/130738884/8978099.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007704.bin
79baaaa9610cbe9ebfbad282da6f6eeeed82f6819df10f4981d9c2a31caf77b5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7704 7888 bytes
font_01_sfnt_off00009536.bin
2f79ba52acca039e5c354f09c372eb8b3e5c303dfc88b98fa2ec462876c681ba		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9536 16160 bytes

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