Malicious PDF — malware analysis report

Static analysis result for SHA-256 12d7ff3f435ef339…

MALICIOUS

PDF

37.7 KB Created: 2020-05-11 19:23:28 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: f16f191d76d42d569196c38c0e137fa7 SHA-1: 6709e851cb4389947660618255303eb54f80a374 SHA-256: 12d7ff3f435ef3390c107cce22084510fbfbba80c5c7bdf872b37faff3da1ee0
96 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic. The primary URL, http://beyondhillco.com/uploads/1/3/0/5/130540507/130540507.html#advanced+java+tutorials+point+pdf, and numerous others point to domains that appear to be part of a link farm. This suggests the document's purpose is to manipulate search engine rankings or redirect users to potentially malicious content hosted on these external sites. No scripts were extracted, but the sheer volume of outbound links is highly suspicious.

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://beyondhillco.com/uploads/1/3/0/5/130540507/130540507.html#advanced+java+tutorials+point+pdf
    • http://thevetofnature.com/uploads/1/3/0/3/130379121/kisolusakewupi.pdf
    • http://cmamarketingpr.com/uploads/1/3/1/4/131453352/1290499.pdf
    • http://zuzubeanpress.com/uploads/1/3/0/5/130552084/3dbabb6ca3.pdf
    • http://the-belly-up.com/uploads/1/3/0/5/130588783/894054ff4cdd.pdf
    • http://thomascreekbrewery.com/uploads/1/3/0/6/130639379/litinok_vobateva_sedobuvigekipi.pdf
    • http://bradley-portfolio.com/uploads/1/3/0/4/130488743/b2ce0f.pdf
    • http://harvestcityworship.com/uploads/1/3/0/3/130313603/7263634.pdf
    • http://kelownahorseback.com/uploads/1/3/0/5/130543025/rozetexive.pdf
    • http://humanitiesandtechnologyreview.com/uploads/1/3/0/2/130271063/44140.pdf
    • http://cocoearlyebay.com/uploads/1/3/0/6/130620207/manaxoxado-kutowib-wodaxasupowubo.pdf
    • http://gellerglass.com/uploads/1/3/0/6/130604934/b558fe8e10268e3.pdf
    • http://mecanicienindustriel.com/uploads/1/3/0/4/130488371/9231961c4.pdf
    • http://garydannenbaum.com/uploads/1/3/1/3/131378991/mofaberulusevodefitu.pdf
    • http://invasion-games.com/uploads/1/3/0/4/130483498/1462066.pdf
    • http://ordinarymarvels.net/uploads/1/3/0/2/130289184/mijojeweluxeso.pdf
    • http://thefloweroflife.world/uploads/1/3/0/5/130590779/vapuvujunax.pdf
    • http://sjgroupinc.net/uploads/1/3/0/7/130739699/rupimojoki.pdf
    • http://whatshottaccessories.com/uploads/1/3/0/6/130604681/5519485.pdf
    • http://tmdgroupllc.net/uploads/1/3/0/8/130813373/7252110.pdf
    • http://parallaxphotography.net/uploads/1/3/1/4/131437330/391353c978fc.pdf
    • http://betterwiththebible.com/uploads/1/3/0/4/130476344/medikovuvavisikawe.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • 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_off00006814.bin
f74ce42b08a142ba1eb76d0a4c8feb6ac105d3302aac67ead028179a92203a56		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6814 10872 bytes

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