Malicious PDF — malware analysis report

Static analysis result for SHA-256 92acf07609393fa5…

MALICIOUS

PDF

49.3 KB Created: 2020-03-20 08:45:59 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 1303d3b3125a704c4f252dbc543aa096 SHA-1: aa4dfdae6a2a19e622d014ceb562b4c536a07ccf SHA-256: 92acf07609393fa54d39ce8078cea5574d19cfdee233d3dcab6b26efa6ff0a58
94 Risk Score

Malware Insights

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

The PDF document was flagged by a machine learning classifier as malicious. It contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various domains. These links likely serve as a link farm to distribute malicious content or conduct phishing attacks. No scripts were extracted from this sample.

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://harlesz.com/uploads/1/3/0/6/130604162/130604162.html#ciclo+de+brayton+com+regenera%C3%A7%C3%A3o
    • http://nnvmayorscup.com/uploads/1/3/0/2/130272080/tenepowaledug_nisubuxowinir_mikalazog_watisorelafu.pdf
    • http://www.yeaperks.com/uploads/1/3/0/5/130588987/082607.pdf
    • http://babyladymn.com/uploads/1/3/0/9/130969910/zajutokuwapimofofuso.pdf
    • http://waibiz.nz/uploads/1/3/0/5/130589219/8681585.pdf
    • http://circumsolarmp.co.uk/uploads/1/3/0/6/130620598/keguluzawav-jupukepesuvab.pdf
    • http://dinner-ateight.com/uploads/1/3/0/4/130483638/7386195.pdf
    • http://therapyhavenaz.com/uploads/1/3/0/5/130588653/0f1b10d1.pdf
    • http://acp-ce.net/uploads/1/3/0/8/130874610/bemofu.pdf
    • http://simpletomatoes.com/uploads/1/3/0/5/130550949/mimavala-bomitekibosifov.pdf
    • http://richmondandflood.com/uploads/1/3/0/8/130814902/gixuxomikedevunabefu.pdf
    • http://applyfordisabilitynow.us/uploads/1/3/0/7/130775554/4548822.pdf
    • http://www.dociamyer.com/uploads/1/3/0/4/130475979/6350274.pdf
    • http://art-by-age.com/uploads/1/3/0/2/130287314/roremulez.pdf
    • http://seaisfun.com/uploads/1/3/0/2/130288563/fa62a48a371e.pdf
    • http://metrowestgirlssoftball.org/uploads/1/3/0/6/130605387/fosokuze.pdf
    • http://wilcoxlighting.com/uploads/1/3/0/5/130550915/1aaca3.pdf
    • http://scentaliciouscandles.com/uploads/1/3/0/9/130969262/8e7b0c37f13.pdf
    • http://www.kddoula.com/uploads/1/3/0/2/130289502/kavukuril.pdf
    • http://thebonetique.ca/uploads/1/3/0/9/130969445/364469.pdf
    • http://mobile.tampalandscapedesign.com/uploads/1/3/0/8/130874384/e35be66.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000074fb.bin
803b3ae1c9d5365844b2ddc71b9db9725eff84382993048cbb1dd4473b3d20a8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74FB 9860 bytes
font_01_sfnt_off000095d4.bin
9d4d6e01e0ba9a76802a5decd14bb2abcc652d5070a70843a1a925ce67e02481		 pdf-font-stream PDF embedded font (sfnt) at offset 0x95D4 2864 bytes
font_02_sfnt_off00009ff5.bin
b080e6aa9682ff87567a230b404ab00780bafcfd3ba11e3f536b788ca6e08ef5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9FF5 16060 bytes

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