Malicious PDF — malware analysis report

Static analysis result for SHA-256 5058d48fdb6f4a32…

MALICIOUS

PDF

43.3 KB Created: 2020-03-09 13:09:47 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: e6e80f0ba5b5159dab066ee6152c187e SHA-1: 6757ab87a534319d81e71f3f572492fc187dbe5c SHA-256: 5058d48fdb6f4a32afa9f7f1bba0bbb88a118b1937bb79d9b0cb7d4e02b94e8b
96 Risk Score

Malware Insights

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

The PDF contains numerous external links, indicating a link farm or redirection strategy. The ML classifier strongly flagged this PDF as malicious. The document body, though obfuscated, contains URLs that are also present in the extracted URL list. The primary attack pattern involves directing users to external websites, likely for SEO spam or to host 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://marconettzoo.com/uploads/1/3/0/3/130313178/130313178.html#adding+and+subtracting+mixed+number+fractions+with+like+denominators+worksheets
    • http://stntradingenterprise.com/uploads/1/3/0/2/130270879/koganalagiwigedax.pdf
    • http://www.washitallcastillery.com/uploads/1/3/0/2/130273740/pamegetir-pesakezewipuk.pdf
    • http://54321.fashion/uploads/1/3/0/4/130476624/xarobojasawefab.pdf
    • http://hostmaster.jetabejtullahu.com/uploads/1/3/0/7/130776152/jumajun.pdf
    • http://cathybird.studio/uploads/1/3/0/4/130476390/3313b142616623.pdf
    • http://yoursocialfootprint.com/uploads/1/3/0/7/130776672/b80f6e31.pdf
    • http://ketchikanwhales.com/uploads/1/3/0/5/130589286/521f609.pdf
    • http://aaia2.com/uploads/1/3/0/5/130550824/f2da54a9b527.pdf
    • http://tubbspeedinnovation.com/uploads/1/3/0/5/130550903/7829002.pdf
    • http://lovereimagined.com/uploads/1/3/0/5/130551324/pirufonebutuligige.pdf
    • http://gayporn.onl/uploads/1/3/0/7/130775760/5356026.pdf
    • http://ashleyerinenglish.com/uploads/1/3/0/6/130621547/1869705.pdf
    • http://ryanjameslandscapingri.com/uploads/1/3/0/6/130621210/wobodelinuf-fodux-vexube.pdf
    • http://sydneybuyandsell.com/uploads/1/3/0/7/130776131/2308973.pdf
    • http://panicroomrva.com/uploads/1/3/0/6/130621077/188263.pdf
    • http://autodiscover.thegospelstation.com/uploads/1/3/0/7/130775393/9ff79e6b.pdf
    • http://theyouthchallenge.com/uploads/1/3/0/7/130775758/xobusiva.pdf
    • http://daviddostilio.com/uploads/1/3/0/2/130288639/puwanala.pdf
    • http://superfuckingamazing.net/uploads/1/3/0/7/130775111/24e525.pdf
    • http://shopconsidertheravens.com/uploads/1/3/0/4/130489097/pekupofogo-dapawud-kosobu.pdf
    • http://elevenoaksmobilehomepark.com/uploads/1/3/0/6/130621273/17383a1d167.pdf
    • http://neurogastrolab.com/uploads/1/3/0/5/130538833/8537744.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_off00007e7a.bin
15b2c9077538e33670aaff01fcad040575661bb04a6559a878a438d8a5b7e3d5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E7A 7600 bytes

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